121664472 has 16 divisors (see below), whose sum is σ = 304161240. Its totient is φ = 40554816.

The previous prime is 121664453. The next prime is 121664479. The reversal of 121664472 is 274466121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121664479) 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, 2534653 + ... + 2534700.

Almost surely, 2^121664472 is an apocalyptic number.

121664472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121664472 is an abundant number, since it is smaller than the sum of its proper divisors (182496768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121664472 is a wasteful number, since it uses less digits than its factorization.

121664472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5069362 (or 5069358 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 121664472 is about 11030.1619208423. The cubic root of 121664472 is about 495.5124740474.

The spelling of 121664472 in words is "one hundred twenty-one million, six hundred sixty-four thousand, four hundred seventy-two".