21210131032 has 16 divisors (see below), whose sum is σ = 40022303760. Its totient is φ = 10537516704.

The previous prime is 21210130927. The next prime is 21210131051. The reversal of 21210131032 is 23013101212.

It is a junction number, because it is equal to n+sod(n) for n = 21210130997 and 21210131015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8442268 + ... + 8444779.

It is an arithmetic number, because the mean of its divisors is an integer number (2501393985).

Almost surely, 2^21210131032 is an apocalyptic number.

It is an amenable number.

21210131032 is a deficient number, since it is larger than the sum of its proper divisors (18812172728).

21210131032 is a wasteful number, since it uses less digits than its factorization.

21210131032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16887210 (or 16887206 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21210131032 its reverse (23013101212), we get a palindrome (44223232244).

The spelling of 21210131032 in words is "twenty-one billion, two hundred ten million, one hundred thirty-one thousand, thirty-two".