121355372 has 24 divisors (see below), whose sum is σ = 223851600. Its totient is φ = 57477056.

The previous prime is 121355371. The next prime is 121355411. The reversal of 121355372 is 273553121.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (121355371) 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 in 7 ways as a sum of consecutive naturals, for example, 3722 + ... + 16017.

It is an arithmetic number, because the mean of its divisors is an integer number (9327150).

Almost surely, 2^121355372 is an apocalyptic number.

It is an amenable number.

121355372 is a deficient number, since it is larger than the sum of its proper divisors (102496228).

121355372 is a wasteful number, since it uses less digits than its factorization.

121355372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19825 (or 19823 counting only the distinct ones).

The product of its digits is 6300, while the sum is 29.

The square root of 121355372 is about 11016.1414297385. The cubic root of 121355372 is about 495.0924862048.

The spelling of 121355372 in words is "one hundred twenty-one million, three hundred fifty-five thousand, three hundred seventy-two".