21263334013332 has 36 divisors (see below), whose sum is σ = 53750996519220. Its totient is φ = 7087512511872.

The previous prime is 21263334013321. The next prime is 21263334013387. The reversal of 21263334013332 is 23331043336212.

21263334013332 is a `hidden beast` number, since 2 + 1 + 2 + 633 + 3 + 4 + 0 + 13 + 3 + 3 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17093627189136 + 4169706824196 = 4134444^2 + 2041986^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×21263334013332³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10086583 + ... + 12011070.

It is an arithmetic number, because the mean of its divisors is an integer number (1493083236645).

Almost surely, 2^{21263334013332} is an apocalyptic number.

It is an amenable number.

21263334013332 is an abundant number, since it is smaller than the sum of its proper divisors (32487662505888).

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

21263334013332 is a wasteful number, since it uses less digits than its factorization.

21263334013332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22124392 (or 22124387 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 36.

Adding to 21263334013332 its reverse (23331043336212), we get a palindrome (44594377349544).

The spelling of 21263334013332 in words is "twenty-one trillion, two hundred sixty-three billion, three hundred thirty-four million, thirteen thousand, three hundred thirty-two".