1231989122 has 16 divisors (see below), whose sum is σ = 2274441792. Its totient is φ = 487380240.

The previous prime is 1231989071. The next prime is 1231989137. The reversal of 1231989122 is 2219891321.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3384404 + ... + 3384767.

It is an arithmetic number, because the mean of its divisors is an integer number (142152612).

Almost surely, 2^1231989122 is an apocalyptic number.

1231989122 is a deficient number, since it is larger than the sum of its proper divisors (1042452670).

1231989122 is a wasteful number, since it uses less digits than its factorization.

1231989122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6769193.

The product of its digits is 15552, while the sum is 38.

The square root of 1231989122 is about 35099.7025913326. The cubic root of 1231989122 is about 1072.0185270291.

The spelling of 1231989122 in words is "one billion, two hundred thirty-one million, nine hundred eighty-nine thousand, one hundred twenty-two".