21122065323 has 12 divisors (see below), whose sum is σ = 30562533768. Its totient is φ = 14056968960.

The previous prime is 21122065319. The next prime is 21122065337. The reversal of 21122065323 is 32356022112.

It is a happy number.

21122065323 is a `hidden beast` number, since 2 + 1 + 1 + 2 + 2 + 0 + 653 + 2 + 3 = 666.

It is not a de Polignac number, because 21122065323 - 2² = 21122065319 is a prime.

It is a super-2 number, since 2×21122065323² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122065373) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2028513 + ... + 2038898.

It is an arithmetic number, because the mean of its divisors is an integer number (2546877814).

Almost surely, 2^21122065323 is an apocalyptic number.

21122065323 is a deficient number, since it is larger than the sum of its proper divisors (9440468445).

21122065323 is a wasteful number, since it uses less digits than its factorization.

21122065323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4067994 (or 4067991 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 21122065323 its reverse (32356022112), we get a palindrome (53478087435).

The spelling of 21122065323 in words is "twenty-one billion, one hundred twenty-two million, sixty-five thousand, three hundred twenty-three".