21121020311132 has 24 divisors (see below), whose sum is σ = 42242351649120. Its totient is φ = 9051799199040.

The previous prime is 21121020311117. The next prime is 21121020311191. The reversal of 21121020311132 is 23111302012112.

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, 1193282 + ... + 6608022.

It is an arithmetic number, because the mean of its divisors is an integer number (1760097985380).

Almost surely, 2^{21121020311132} is an apocalyptic number.

It is an amenable number.

21121020311132 is an abundant number, since it is smaller than the sum of its proper divisors (21121331337988).

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

21121020311132 is a wasteful number, since it uses less digits than its factorization.

21121020311132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5554061 (or 5554059 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21121020311132 its reverse (23111302012112), we get a palindrome (44232322323244).

The spelling of 21121020311132 in words is "twenty-one trillion, one hundred twenty-one billion, twenty million, three hundred eleven thousand, one hundred thirty-two".