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11112212111021 = 74495519640613
BaseRepresentation
bin1010000110110100001101…
…1101001001111010101101
31110100022120011112112112022
42201231003131021322231
52424030302300023041
635344514010315525
72224554655324130
oct241550335117255
943308504475468
1011112212111021
1135a473205084a
1212b5755428ba5
13627b53002c98
142a5b9646a217
151440c2ab224b
hexa1b43749ead

11112212111021 has 16 divisors (see below), whose sum is σ = 12730281408000. Its totient is φ = 9501803179008.

The previous prime is 11112212110991. The next prime is 11112212111089. The reversal of 11112212111021 is 12011121221111.

It is not a de Polignac number, because 11112212111021 - 26 = 11112212110957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112212113021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17025911 + ... + 17666523.

It is an arithmetic number, because the mean of its divisors is an integer number (795642588000).

Almost surely, 211112212111021 is an apocalyptic number.

It is an amenable number.

11112212111021 is a deficient number, since it is larger than the sum of its proper divisors (1618069296979).

11112212111021 is an equidigital number, since it uses as much as digits as its factorization.

11112212111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646588.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 11112212111021 its reverse (12011121221111), we get a palindrome (23123333332132).

The spelling of 11112212111021 in words is "eleven trillion, one hundred twelve billion, two hundred twelve million, one hundred eleven thousand, twenty-one".

Divisors: 1 7 449 3143 5519 38633 640613 2478031 4484291 17346217 287635237 2013446659 3535543147 24748802029 1587458873003 11112212111021