120216506521 has 4 divisors (see below), whose sum is σ = 120323557072. Its totient is φ = 120109455972.

The previous prime is 120216506483. The next prime is 120216506537. The reversal of 120216506521 is 125605612021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 120216506521 - 2²⁷ = 120082288793 is a prime.

It is a super-2 number, since 2×120216506521² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120216506561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53523591 + ... + 53525836.

It is an arithmetic number, because the mean of its divisors is an integer number (30080889268).

Almost surely, 2^120216506521 is an apocalyptic number.

It is an amenable number.

120216506521 is a deficient number, since it is larger than the sum of its proper divisors (107050551).

120216506521 is a wasteful number, since it uses less digits than its factorization.

120216506521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107050550.

The product of its (nonzero) digits is 7200, while the sum is 31.

The spelling of 120216506521 in words is "one hundred twenty billion, two hundred sixteen million, five hundred six thousand, five hundred twenty-one".