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21420322111 = 97220828063
BaseRepresentation
bin10011111100110000…
…000010110100111111
32001021211010002220101
4103330300002310333
5322332100301421
613501303501531
71355546506456
oct237460026477
961254102811
1021420322111
1190a2239051
1241997578a7
132034a20316
141072ba7b9d
158557c7191
hex4fcc02d3f

21420322111 has 4 divisors (see below), whose sum is σ = 21641150272. Its totient is φ = 21199493952.

The previous prime is 21420322057. The next prime is 21420322117. The reversal of 21420322111 is 11122302412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21420322111 - 27 = 21420321983 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 (21420322117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110413935 + ... + 110414128.

It is an arithmetic number, because the mean of its divisors is an integer number (5410287568).

Almost surely, 221420322111 is an apocalyptic number.

21420322111 is a deficient number, since it is larger than the sum of its proper divisors (220828161).

21420322111 is an equidigital number, since it uses as much as digits as its factorization.

21420322111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220828160.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21420322111 its reverse (11122302412), we get a palindrome (32542624523).

The spelling of 21420322111 in words is "twenty-one billion, four hundred twenty million, three hundred twenty-two thousand, one hundred eleven".

Divisors: 1 97 220828063 21420322111