121113540 has 72 divisors (see below), whose sum is σ = 368309760. Its totient is φ = 32215104.

The previous prime is 121113527. The next prime is 121113569. The reversal of 121113540 is 45311121.

121113540 is a `hidden beast` number, since 12 + 1 + 113 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 110877 + ... + 111963.

Almost surely, 2^121113540 is an apocalyptic number.

121113540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121113540 is an abundant number, since it is smaller than the sum of its proper divisors (247196220).

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

121113540 is a wasteful number, since it uses less digits than its factorization.

121113540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721 (or 1716 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 121113540 is about 11005.1596989776. The cubic root of 121113540 is about 494.7634008560.

Adding to 121113540 its reverse (45311121), we get a palindrome (166424661).

It can be divided in two parts, 12111 and 3540, that added together give a palindrome (15651).

The spelling of 121113540 in words is "one hundred twenty-one million, one hundred thirteen thousand, five hundred forty".