22003521500421 has 12 divisors (see below), whose sum is σ = 32257235500672. Its totient is φ = 14450073820776.

The previous prime is 22003521500413. The next prime is 22003521500423. The reversal of 22003521500421 is 12400512530022.

22003521500421 is a `hidden beast` number, since 2 + 20 + 0 + 3 + 5 + 215 + 0 + 0 + 421 = 666.

It is not a de Polignac number, because 22003521500421 - 2³ = 22003521500413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22003521500423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18245042101 + ... + 18245043306.

Almost surely, 2^{22003521500421} is an apocalyptic number.

It is an amenable number.

22003521500421 is a deficient number, since it is larger than the sum of its proper divisors (10253714000251).

22003521500421 is a wasteful number, since it uses less digits than its factorization.

22003521500421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36490085480 (or 36490085477 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The spelling of 22003521500421 in words is "twenty-two trillion, three billion, five hundred twenty-one million, five hundred thousand, four hundred twenty-one".