211317974956 has 12 divisors (see below), whose sum is σ = 403425225000. Its totient is φ = 96053624960.

The previous prime is 211317974953. The next prime is 211317975107. The reversal of 211317974956 is 659479713112.

It is a junction number, because it is equal to n+sod(n) for n = 211317974897 and 211317974906.

It is not an unprimeable number, because it can be changed into a prime (211317974953) 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, 2401340581 + ... + 2401340668.

It is an arithmetic number, because the mean of its divisors is an integer number (33618768750).

Almost surely, 2^211317974956 is an apocalyptic number.

It is an amenable number.

211317974956 is a deficient number, since it is larger than the sum of its proper divisors (192107250044).

211317974956 is a wasteful number, since it uses less digits than its factorization.

211317974956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4802681264 (or 4802681262 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 55.

The spelling of 211317974956 in words is "two hundred eleven billion, three hundred seventeen million, nine hundred seventy-four thousand, nine hundred fifty-six".