121125812 has 6 divisors (see below), whose sum is σ = 211970178. Its totient is φ = 60562904.

The previous prime is 121125793. The next prime is 121125839. The reversal of 121125812 is 218521121.

It can be written as a sum of positive squares in only one way, i.e., 76983076 + 44142736 = 8774^2 + 6644^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15140723 + ... + 15140730.

It is an arithmetic number, because the mean of its divisors is an integer number (35328363).

Almost surely, 2^121125812 is an apocalyptic number.

It is an amenable number.

121125812 is a deficient number, since it is larger than the sum of its proper divisors (90844366).

121125812 is a wasteful number, since it uses less digits than its factorization.

121125812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30281457 (or 30281455 counting only the distinct ones).

The product of its digits is 320, while the sum is 23.

The square root of 121125812 is about 11005.7172415068. The cubic root of 121125812 is about 494.7801111577.

Adding to 121125812 its reverse (218521121), we get a palindrome (339646933).

The spelling of 121125812 in words is "one hundred twenty-one million, one hundred twenty-five thousand, eight hundred twelve".