21021132323100 has 144 divisors (see below), whose sum is σ = 74856791303168. Its totient is φ = 4435227912960.

The previous prime is 21021132323083. The next prime is 21021132323201. The reversal of 21021132323100 is 132323112012.

It is a super-2 number, since 2×21021132323100² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 384975124 + ... + 385029723.

Almost surely, 2^{21021132323100} is an apocalyptic number.

21021132323100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21021132323100 is an abundant number, since it is smaller than the sum of its proper divisors (53835658980068).

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

21021132323100 is a wasteful number, since it uses less digits than its factorization.

21021132323100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770004884 (or 770004877 counting only the distinct ones).

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

Adding to 21021132323100 its reverse (132323112012), we get a palindrome (21153455435112).

The spelling of 21021132323100 in words is "twenty-one trillion, twenty-one billion, one hundred thirty-two million, three hundred twenty-three thousand, one hundred".