121337540 has 48 divisors (see below), whose sum is σ = 260649984. Its totient is φ = 47433600.

The previous prime is 121337539. The next prime is 121337549. The reversal of 121337540 is 45733121.

It is a super-2 number, since 2×121337540² = 29445597226503200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121337549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 330437 + ... + 330803.

It is an arithmetic number, because the mean of its divisors is an integer number (5430208).

Almost surely, 2^121337540 is an apocalyptic number.

121337540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121337540 is an abundant number, since it is smaller than the sum of its proper divisors (139312444).

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

121337540 is a wasteful number, since it uses less digits than its factorization.

121337540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708 (or 706 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 121337540 is about 11015.3320422037. The cubic root of 121337540 is about 495.0682353303.

The spelling of 121337540 in words is "one hundred twenty-one million, three hundred thirty-seven thousand, five hundred forty".