21132331093 has 2 divisors, whose sum is σ = 21132331094. Its totient is φ = 21132331092.

The previous prime is 21132331081. The next prime is 21132331127. The reversal of 21132331093 is 39013323112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11794394404 + 9337936689 = 108602^2 + 96633^2 .

It is a cyclic number.

It is not a de Polignac number, because 21132331093 - 2⁹ = 21132330581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21132331013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566165546 + 10566165547.

It is an arithmetic number, because the mean of its divisors is an integer number (10566165547).

Almost surely, 2^21132331093 is an apocalyptic number.

It is an amenable number.

21132331093 is a deficient number, since it is larger than the sum of its proper divisors (1).

21132331093 is an equidigital number, since it uses as much as digits as its factorization.

21132331093 is an evil number, because the sum of its binary digits is even.

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

The spelling of 21132331093 in words is "twenty-one billion, one hundred thirty-two million, three hundred thirty-one thousand, ninety-three".