21133020131 has 2 divisors, whose sum is σ = 21133020132. Its totient is φ = 21133020130.

The previous prime is 21133020109. The next prime is 21133020143. The reversal of 21133020131 is 13102033112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21133020131 - 2⁶ = 21133020067 is a prime.

It is a super-2 number, since 2×21133020131² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21133020631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566510065 + 10566510066.

It is an arithmetic number, because the mean of its divisors is an integer number (10566510066).

Almost surely, 2^21133020131 is an apocalyptic number.

21133020131 is a deficient number, since it is larger than the sum of its proper divisors (1).

21133020131 is an equidigital number, since it uses as much as digits as its factorization.

21133020131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21133020131 its reverse (13102033112), we get a palindrome (34235053243).

The spelling of 21133020131 in words is "twenty-one billion, one hundred thirty-three million, twenty thousand, one hundred thirty-one".