21100323612 has 24 divisors (see below), whose sum is σ = 51825356800. Its totient is φ = 6663260016.

The previous prime is 21100323611. The next prime is 21100323613. The reversal of 21100323612 is 21632300112.

It is an interprime number because it is at equal distance from previous prime (21100323611) and next prime (21100323613).

It is a super-2 number, since 2×21100323612² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100323611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46272412 + ... + 46272867.

Almost surely, 2^21100323612 is an apocalyptic number.

It is an amenable number.

21100323612 is an abundant number, since it is smaller than the sum of its proper divisors (30725033188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21100323612 is a wasteful number, since it uses less digits than its factorization.

21100323612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92545305 (or 92545303 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21100323612 its reverse (21632300112), we get a palindrome (42732623724).

The spelling of 21100323612 in words is "twenty-one billion, one hundred million, three hundred twenty-three thousand, six hundred twelve".