121233540 has 48 divisors (see below), whose sum is σ = 339958080. Its totient is φ = 32280960.

The previous prime is 121233527. The next prime is 121233551. The reversal of 121233540 is 45332121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60271 + ... + 62249.

It is an arithmetic number, because the mean of its divisors is an integer number (7082460).

Almost surely, 2^121233540 is an apocalyptic number.

121233540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121233540 is an abundant number, since it is smaller than the sum of its proper divisors (218724540).

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

121233540 is a wasteful number, since it uses less digits than its factorization.

121233540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3012 (or 3010 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 121233540 is about 11010.6103373065. The cubic root of 121233540 is about 494.9267517368.

Adding to 121233540 its reverse (45332121), we get a palindrome (166565661).

The spelling of 121233540 in words is "one hundred twenty-one million, two hundred thirty-three thousand, five hundred forty".