21133311210331 has 16 divisors (see below), whose sum is σ = 21272696441568. Its totient is φ = 20994261523200.

The previous prime is 21133311210329. The next prime is 21133311210359. The reversal of 21133311210331 is 13301211333112.

It is a cyclic number.

It is not a de Polignac number, because 21133311210331 - 2¹ = 21133311210329 is a prime.

It is a super-2 number, since 2×21133311210331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21133311210296 and 21133311210305.

It is not an unprimeable number, because it can be changed into a prime (21133311210371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 998586556 + ... + 998607718.

It is an arithmetic number, because the mean of its divisors is an integer number (1329543527598).

Almost surely, 2^{21133311210331} is an apocalyptic number.

21133311210331 is a deficient number, since it is larger than the sum of its proper divisors (139385231237).

21133311210331 is a wasteful number, since it uses less digits than its factorization.

21133311210331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28782.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 21133311210331 its reverse (13301211333112), we get a palindrome (34434522543443).

The spelling of 21133311210331 in words is "twenty-one trillion, one hundred thirty-three billion, three hundred eleven million, two hundred ten thousand, three hundred thirty-one".