21031133313132 has 144 divisors (see below), whose sum is σ = 55705618934784. Its totient is φ = 6683251680000.

The previous prime is 21031133313097. The next prime is 21031133313191. The reversal of 21031133313132 is 23131333113012.

21031133313132 is a `hidden beast` number, since 2 + 1 + 0 + 3 + 1 + 13 + 331 + 313 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21031133313096 and 21031133313105.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 43533507 + ... + 44013957.

It is an arithmetic number, because the mean of its divisors is an integer number (386844575936).

Almost surely, 2^{21031133313132} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21031133313132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27852809467392).

21031133313132 is an abundant number, since it is smaller than the sum of its proper divisors (34674485621652).

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

21031133313132 is a wasteful number, since it uses less digits than its factorization.

21031133313132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481180 (or 481175 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 27.

Adding to 21031133313132 its reverse (23131333113012), we get a palindrome (44162466426144).

The spelling of 21031133313132 in words is "twenty-one trillion, thirty-one billion, one hundred thirty-three million, three hundred thirteen thousand, one hundred thirty-two".