211156521216 has 36 divisors (see below), whose sum is σ = 561984285072. Its totient is φ = 70385506816.

The previous prime is 211156521187. The next prime is 211156521283. The reversal of 211156521216 is 612125651112.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137470926 + ... + 137472461.

Almost surely, 2^211156521216 is an apocalyptic number.

It is an amenable number.

211156521216 is an abundant number, since it is smaller than the sum of its proper divisors (350827763856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211156521216 is an equidigital number, since it uses as much as digits as its factorization.

211156521216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274943406 (or 274943392 counting only the distinct ones).

The product of its digits is 7200, while the sum is 33.

The spelling of 211156521216 in words is "two hundred eleven billion, one hundred fifty-six million, five hundred twenty-one thousand, two hundred sixteen".