121353720 has 32 divisors (see below), whose sum is σ = 364061520. Its totient is φ = 32360960.

The previous prime is 121353679. The next prime is 121353721. The reversal of 121353720 is 27353121.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121353721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505521 + ... + 505760.

Almost surely, 2^121353720 is an apocalyptic number.

121353720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121353720 is an abundant number, since it is smaller than the sum of its proper divisors (242707800).

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

121353720 is a wasteful number, since it uses less digits than its factorization.

121353720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011295 (or 1011291 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 121353720 is about 11016.0664486013. The cubic root of 121353720 is about 495.0902396444.

The spelling of 121353720 in words is "one hundred twenty-one million, three hundred fifty-three thousand, seven hundred twenty".