21132202153 has 2 divisors, whose sum is σ = 21132202154. Its totient is φ = 21132202152.

The previous prime is 21132202139. The next prime is 21132202253. The reversal of 21132202153 is 35120223112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12886109289 + 8246092864 = 113517^2 + 90808^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21132202153 is a prime.

It is not a weakly prime, because it can be changed into another prime (21132202253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566101076 + 10566101077.

It is an arithmetic number, because the mean of its divisors is an integer number (10566101077).

Almost surely, 2^21132202153 is an apocalyptic number.

It is an amenable number.

21132202153 is a deficient number, since it is larger than the sum of its proper divisors (1).

21132202153 is an equidigital number, since it uses as much as digits as its factorization.

21132202153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 21132202153 its reverse (35120223112), we get a palindrome (56252425265).

The spelling of 21132202153 in words is "twenty-one billion, one hundred thirty-two million, two hundred two thousand, one hundred fifty-three".