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, 2^{11112212111021} 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".