121165212 has 48 divisors (see below), whose sum is σ = 327944960. Its totient is φ = 34100352.

The previous prime is 121165211. The next prime is 121165217. The reversal of 121165212 is 212561121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121165211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5137 + ... + 16392.

Almost surely, 2^121165212 is an apocalyptic number.

121165212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121165212 is an abundant number, since it is smaller than the sum of its proper divisors (206779748).

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

121165212 is a wasteful number, since it uses less digits than its factorization.

121165212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21610 (or 21608 counting only the distinct ones).

The product of its digits is 240, while the sum is 21.

The square root of 121165212 is about 11007.5070747195. The cubic root of 121165212 is about 494.8337529668.

The spelling of 121165212 in words is "one hundred twenty-one million, one hundred sixty-five thousand, two hundred twelve".