121784372 has 6 divisors (see below), whose sum is σ = 213122658. Its totient is φ = 60892184.

The previous prime is 121784371. The next prime is 121784381. The reversal of 121784372 is 273487121.

It can be written as a sum of positive squares in only one way, i.e., 120912016 + 872356 = 10996^2 + 934^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121784371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15223043 + ... + 15223050.

It is an arithmetic number, because the mean of its divisors is an integer number (35520443).

Almost surely, 2^121784372 is an apocalyptic number.

It is an amenable number.

121784372 is a deficient number, since it is larger than the sum of its proper divisors (91338286).

121784372 is a wasteful number, since it uses less digits than its factorization.

121784372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30446097 (or 30446095 counting only the distinct ones).

The product of its digits is 18816, while the sum is 35.

The square root of 121784372 is about 11035.5956794366. The cubic root of 121784372 is about 495.6751959951.

The spelling of 121784372 in words is "one hundred twenty-one million, seven hundred eighty-four thousand, three hundred seventy-two".