21133233113131 has 2 divisors, whose sum is σ = 21133233113132. Its totient is φ = 21133233113130.

The previous prime is 21133233113117. The next prime is 21133233113141. The reversal of 21133233113131 is 13131133233112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21133233113131 - 2³⁵ = 21098873374763 is a prime.

It is a super-2 number, since 2×21133233113131² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21133233113131.

It is not a weakly prime, because it can be changed into another prime (21133233113141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566616556565 + 10566616556566.

It is an arithmetic number, because the mean of its divisors is an integer number (10566616556566).

Almost surely, 2^{21133233113131} is an apocalyptic number.

21133233113131 is a deficient number, since it is larger than the sum of its proper divisors (1).

21133233113131 is an equidigital number, since it uses as much as digits as its factorization.

21133233113131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 28.

Adding to 21133233113131 its reverse (13131133233112), we get a palindrome (34264366346243).

The spelling of 21133233113131 in words is "twenty-one trillion, one hundred thirty-three billion, two hundred thirty-three million, one hundred thirteen thousand, one hundred thirty-one".