21220048215 has 24 divisors (see below), whose sum is σ = 36868816608. Its totient is φ = 11290466880.

The previous prime is 21220048177. The next prime is 21220048237. The reversal of 21220048215 is 51284002212.

It is not a de Polignac number, because 21220048215 - 2²⁴ = 21203270999 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 541099 + ... + 578988.

It is an arithmetic number, because the mean of its divisors is an integer number (1536200692).

Almost surely, 2^21220048215 is an apocalyptic number.

21220048215 is a deficient number, since it is larger than the sum of its proper divisors (15648768393).

21220048215 is a wasteful number, since it uses less digits than its factorization.

21220048215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120519 (or 1120516 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The spelling of 21220048215 in words is "twenty-one billion, two hundred twenty million, forty-eight thousand, two hundred fifteen".