123151212 has 24 divisors (see below), whose sum is σ = 319281200. Its totient is φ = 41050368.

The previous prime is 123151211. The next prime is 123151243. The reversal of 123151212 is 212151321.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (123151211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 570037 + ... + 570252.

Almost surely, 2^123151212 is an apocalyptic number.

123151212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123151212 is an abundant number, since it is smaller than the sum of its proper divisors (196129988).

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

123151212 is a wasteful number, since it uses less digits than its factorization.

123151212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140302 (or 1140294 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 123151212 is about 11097.3515759392. The cubic root of 123151212 is about 497.5226955295.

The spelling of 123151212 in words is "one hundred twenty-three million, one hundred fifty-one thousand, two hundred twelve".