21122113210 has 16 divisors (see below), whose sum is σ = 41476149792. Its totient is φ = 7680768400.

The previous prime is 21122113171. The next prime is 21122113219. The reversal of 21122113210 is 1231122112.

It is a super-2 number, since 2×21122113210² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122113219) 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 7 ways as a sum of consecutive naturals, for example, 96009496 + ... + 96009715.

It is an arithmetic number, because the mean of its divisors is an integer number (2592259362).

Almost surely, 2^21122113210 is an apocalyptic number.

21122113210 is a deficient number, since it is larger than the sum of its proper divisors (20354036582).

21122113210 is a wasteful number, since it uses less digits than its factorization.

21122113210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192019229.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21122113210 its reverse (1231122112), we get a palindrome (22353235322).

The spelling of 21122113210 in words is "twenty-one billion, one hundred twenty-two million, one hundred thirteen thousand, two hundred ten".