21131020102132 has 12 divisors (see below), whose sum is σ = 36979336916676. Its totient is φ = 10565495268800.

The previous prime is 21131020102069. The next prime is 21131020102141. The reversal of 21131020102132 is 23120102013112.

It can be written as a sum of positive squares in 2 ways, for example, as 20735965112976 + 395054989156 = 4553676^2 + 628534^2 .

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, 87913 + ... + 6501520.

It is an arithmetic number, because the mean of its divisors is an integer number (3081611409723).

Almost surely, 2^{21131020102132} is an apocalyptic number.

It is an amenable number.

21131020102132 is a deficient number, since it is larger than the sum of its proper divisors (15848316814544).

21131020102132 is a wasteful number, since it uses less digits than its factorization.

21131020102132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7391138 (or 7391136 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21131020102132 its reverse (23120102013112), we get a palindrome (44251122115244).

The spelling of 21131020102132 in words is "twenty-one trillion, one hundred thirty-one billion, twenty million, one hundred two thousand, one hundred thirty-two".