21032102149 has 2 divisors, whose sum is σ = 21032102150. Its totient is φ = 21032102148.

The previous prime is 21032102137. The next prime is 21032102159. The reversal of 21032102149 is 94120123012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14693076225 + 6339025924 = 121215^2 + 79618^2 .

It is a cyclic number.

It is not a de Polignac number, because 21032102149 - 2²⁷ = 20897884421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21032102159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516051074 + 10516051075.

It is an arithmetic number, because the mean of its divisors is an integer number (10516051075).

Almost surely, 2^21032102149 is an apocalyptic number.

It is an amenable number.

21032102149 is a deficient number, since it is larger than the sum of its proper divisors (1).

21032102149 is an equidigital number, since it uses as much as digits as its factorization.

21032102149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 21032102149 in words is "twenty-one billion, thirty-two million, one hundred two thousand, one hundred forty-nine".