21103202293 has 2 divisors, whose sum is σ = 21103202294. Its totient is φ = 21103202292.

The previous prime is 21103202273. The next prime is 21103202333. The reversal of 21103202293 is 39220230112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12877256484 + 8225945809 = 113478^2 + 90697^2 .

It is a cyclic number.

It is not a de Polignac number, because 21103202293 - 2²⁹ = 20566331381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21103202203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551601146 + 10551601147.

It is an arithmetic number, because the mean of its divisors is an integer number (10551601147).

Almost surely, 2^21103202293 is an apocalyptic number.

It is an amenable number.

21103202293 is a deficient number, since it is larger than the sum of its proper divisors (1).

21103202293 is an equidigital number, since it uses as much as digits as its factorization.

21103202293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The spelling of 21103202293 in words is "twenty-one billion, one hundred three million, two hundred two thousand, two hundred ninety-three".