21133159499052 has 144 divisors (see below), whose sum is σ = 58996245907872. Its totient is φ = 6591686169600.

The previous prime is 21133159499017. The next prime is 21133159499059. The reversal of 21133159499052 is 25099495133112.

It is a happy number.

21133159499052 is a `hidden beast` number, since 2 + 1 + 13 + 31 + 594 + 9 + 9 + 0 + 5 + 2 = 666.

It is a super-2 number, since 2×21133159499052² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 21133159499052.

It is not an unprimeable number, because it can be changed into a prime (21133159499059) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 837699 + ... + 6555002.

It is an arithmetic number, because the mean of its divisors is an integer number (409696152138).

Almost surely, 2^{21133159499052} 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 21133159499052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29498122953936).

21133159499052 is an abundant number, since it is smaller than the sum of its proper divisors (37863086408820).

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

21133159499052 is a wasteful number, since it uses less digits than its factorization.

21133159499052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7392910 (or 7392896 counting only the distinct ones).

The product of its (nonzero) digits is 2624400, while the sum is 54.

The spelling of 21133159499052 in words is "twenty-one trillion, one hundred thirty-three billion, one hundred fifty-nine million, four hundred ninety-nine thousand, fifty-two".