121142972 has 6 divisors (see below), whose sum is σ = 212000208. Its totient is φ = 60571484.

The previous prime is 121142971. The next prime is 121142977. The reversal of 121142972 is 279241121.

It is a super-3 number, since 3×121142972³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121142971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15142868 + ... + 15142875.

It is an arithmetic number, because the mean of its divisors is an integer number (35333368).

Almost surely, 2^121142972 is an apocalyptic number.

It is an amenable number.

121142972 is a deficient number, since it is larger than the sum of its proper divisors (90857236).

121142972 is a wasteful number, since it uses less digits than its factorization.

121142972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30285747 (or 30285745 counting only the distinct ones).

The product of its digits is 2016, while the sum is 29.

The square root of 121142972 is about 11006.4968087035. The cubic root of 121142972 is about 494.8034753651.

The spelling of 121142972 in words is "one hundred twenty-one million, one hundred forty-two thousand, nine hundred seventy-two".