121251212 has 12 divisors (see below), whose sum is σ = 212980320. Its totient is φ = 60399696.

The previous prime is 121251209. The next prime is 121251281. The reversal of 121251212 is 212152121.

It is a super-2 number, since 2×121251212² = 29403712822937888, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55268 + ... + 57419.

It is an arithmetic number, because the mean of its divisors is an integer number (17748360).

Almost surely, 2^121251212 is an apocalyptic number.

It is an amenable number.

121251212 is a deficient number, since it is larger than the sum of its proper divisors (91729108).

121251212 is a wasteful number, since it uses less digits than its factorization.

121251212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112960 (or 112958 counting only the distinct ones).

The product of its digits is 80, while the sum is 17.

The square root of 121251212 is about 11011.4128067201. The cubic root of 121251212 is about 494.9507987692.

Subtracting 121251212 from its reverse (212152121), we obtain a palindrome (90900909).

The spelling of 121251212 in words is "one hundred twenty-one million, two hundred fifty-one thousand, two hundred twelve".