1211312992 has 24 divisors (see below), whose sum is σ = 2405883816. Its totient is φ = 600294912.

The previous prime is 1211312989. The next prime is 1211313049. The reversal of 1211312992 is 2992131121.

It is a congruent 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, 163878 + ... + 171109.

It is an arithmetic number, because the mean of its divisors is an integer number (100245159).

Almost surely, 2^1211312992 is an apocalyptic number.

It is an amenable number.

1211312992 is a deficient number, since it is larger than the sum of its proper divisors (1194570824).

1211312992 is a wasteful number, since it uses less digits than its factorization.

1211312992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335110 (or 335102 counting only the distinct ones).

The product of its digits is 1944, while the sum is 31.

The square root of 1211312992 is about 34803.9220778348. The cubic root of 1211312992 is about 1065.9875319304.

The spelling of 1211312992 in words is "one billion, two hundred eleven million, three hundred twelve thousand, nine hundred ninety-two".