121949972 has 12 divisors (see below), whose sum is σ = 215093760. Its totient is φ = 60494616.

The previous prime is 121949969. The next prime is 121949977. The reversal of 121949972 is 279949121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121949977) by changing a digit.

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, 119522 + ... + 120537.

It is an arithmetic number, because the mean of its divisors is an integer number (17924480).

Almost surely, 2^121949972 is an apocalyptic number.

It is an amenable number.

121949972 is a deficient number, since it is larger than the sum of its proper divisors (93143788).

121949972 is a wasteful number, since it uses less digits than its factorization.

121949972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240190 (or 240188 counting only the distinct ones).

The product of its digits is 81648, while the sum is 44.

The square root of 121949972 is about 11043.0961238232. The cubic root of 121949972 is about 495.8997640407.

The spelling of 121949972 in words is "one hundred twenty-one million, nine hundred forty-nine thousand, nine hundred seventy-two".