121979412 has 24 divisors (see below), whose sum is σ = 316243200. Its totient is φ = 40659768.

The previous prime is 121979401. The next prime is 121979413. The reversal of 121979412 is 214979121.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121979413) 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, 564612 + ... + 564827.

It is an arithmetic number, because the mean of its divisors is an integer number (13176800).

Almost surely, 2^121979412 is an apocalyptic number.

121979412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121979412 is an abundant number, since it is smaller than the sum of its proper divisors (194263788).

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

121979412 is a wasteful number, since it uses less digits than its factorization.

121979412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129452 (or 1129444 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 121979412 is about 11044.4290028955. The cubic root of 121979412 is about 495.9396659616.

It can be divided in two parts, 12197 and 9412, that added together give a square (21609 = 147²).

The spelling of 121979412 in words is "one hundred twenty-one million, nine hundred seventy-nine thousand, four hundred twelve".