21203100031132 has 24 divisors (see below), whose sum is σ = 37614953423600. Its totient is φ = 10455980017536.

The previous prime is 21203100031097. The next prime is 21203100031171. The reversal of 21203100031132 is 23113000130212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7834294 + ... + 10187362.

Almost surely, 2^{21203100031132} is an apocalyptic number.

It is an amenable number.

21203100031132 is a deficient number, since it is larger than the sum of its proper divisors (16411853392468).

21203100031132 is a wasteful number, since it uses less digits than its factorization.

21203100031132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2384005 (or 2384003 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21203100031132 its reverse (23113000130212), we get a palindrome (44316100161344).

The spelling of 21203100031132 in words is "twenty-one trillion, two hundred three billion, one hundred million, thirty-one thousand, one hundred thirty-two".