21023011132 has 12 divisors (see below), whose sum is σ = 37058812560. Its totient is φ = 10434778976.

The previous prime is 21023011127. The next prime is 21023011133. The reversal of 21023011132 is 23111032012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023011133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19181032 + ... + 19182127.

It is an arithmetic number, because the mean of its divisors is an integer number (3088234380).

Almost surely, 2^21023011132 is an apocalyptic number.

It is an amenable number.

21023011132 is a deficient number, since it is larger than the sum of its proper divisors (16035801428).

21023011132 is a wasteful number, since it uses less digits than its factorization.

21023011132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38363300 (or 38363298 counting only the distinct ones).

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

Adding to 21023011132 its reverse (23111032012), we get a palindrome (44134043144).

The spelling of 21023011132 in words is "twenty-one billion, twenty-three million, eleven thousand, one hundred thirty-two".