21365001104026 has 4 divisors (see below), whose sum is σ = 32047501656042. Its totient is φ = 10682500552012.

The previous prime is 21365001103987. The next prime is 21365001104143. The reversal of 21365001104026 is 62040110056312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20205069950025 + 1159931154001 = 4495005^2 + 1077001^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5341250276005 + ... + 5341250276008.

Almost surely, 2^{21365001104026} is an apocalyptic number.

21365001104026 is a deficient number, since it is larger than the sum of its proper divisors (10682500552016).

21365001104026 is a wasteful number, since it uses less digits than its factorization.

21365001104026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10682500552015.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 21365001104026 in words is "twenty-one trillion, three hundred sixty-five billion, one million, one hundred four thousand, twenty-six".