121231040 has 56 divisors (see below), whose sum is σ = 329927712. Its totient is φ = 41564160.

The previous prime is 121231031. The next prime is 121231079. The reversal of 121231040 is 40132121.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24821 + ... + 29300.

Almost surely, 2^121231040 is an apocalyptic number.

121231040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121231040 is an abundant number, since it is smaller than the sum of its proper divisors (208696672).

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

121231040 is an equidigital number, since it uses as much as digits as its factorization.

121231040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54145 (or 54135 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 121231040 is about 11010.4968098629. The cubic root of 121231040 is about 494.9233496931.

Adding to 121231040 its reverse (40132121), we get a palindrome (161363161).

The spelling of 121231040 in words is "one hundred twenty-one million, two hundred thirty-one thousand, forty".