91232123212 has 24 divisors (see below), whose sum is σ = 163461326336. Its totient is φ = 44530084368.

The previous prime is 91232123209. The next prime is 91232123273. The reversal of 91232123212 is 21232123219.

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, 157933 + ... + 455419.

Almost surely, 2^91232123212 is an apocalyptic number.

It is an amenable number.

91232123212 is a deficient number, since it is larger than the sum of its proper divisors (72229203124).

91232123212 is a wasteful number, since it uses less digits than its factorization.

91232123212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299317 (or 299315 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The spelling of 91232123212 in words is "ninety-one billion, two hundred thirty-two million, one hundred twenty-three thousand, two hundred twelve".