21101103231010 has 64 divisors (see below), whose sum is σ = 44166685449600. Its totient is φ = 7173299614720.

The previous prime is 21101103230989. The next prime is 21101103231017. The reversal of 21101103231010 is 1013230110112.

It is a happy number.

It is a super-2 number, since 2×21101103231010² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21101103231017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37587184 + ... + 38144443.

It is an arithmetic number, because the mean of its divisors is an integer number (690104460150).

Almost surely, 2^{21101103231010} is an apocalyptic number.

21101103231010 is an abundant number, since it is smaller than the sum of its proper divisors (23065582218590).

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

21101103231010 is a wasteful number, since it uses less digits than its factorization.

21101103231010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75731811.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 21101103231010 its reverse (1013230110112), we get a palindrome (22114333341122).

The spelling of 21101103231010 in words is "twenty-one trillion, one hundred one billion, one hundred three million, two hundred thirty-one thousand, ten".