21242216151 has 12 divisors (see below), whose sum is σ = 33043447528. Its totient is φ = 13072132944.

The previous prime is 21242216131. The next prime is 21242216173. The reversal of 21242216151 is 15161224212.

It is a happy number.

21242216151 is a `hidden beast` number, since 2 + 1 + 2 + 42 + 2 + 1 + 615 + 1 = 666.

It is not a de Polignac number, because 21242216151 - 2³⁰ = 20168474327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21242216131) 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, 90778585 + ... + 90778818.

Almost surely, 2^21242216151 is an apocalyptic number.

21242216151 is a deficient number, since it is larger than the sum of its proper divisors (11801231377).

21242216151 is a wasteful number, since it uses less digits than its factorization.

21242216151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181557422 (or 181557419 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The spelling of 21242216151 in words is "twenty-one billion, two hundred forty-two million, two hundred sixteen thousand, one hundred fifty-one".