121245040440 has 96 divisors (see below), whose sum is σ = 396026748000. Its totient is φ = 32169519360.

The previous prime is 121245040439. The next prime is 121245040453. The reversal of 121245040440 is 44040542121.

121245040440 is a `hidden beast` number, since 1 + 212 + 4 + 5 + 0 + 4 + 0 + 440 = 666.

It is a congruent number.

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, 774571 + ... + 917850.

It is an arithmetic number, because the mean of its divisors is an integer number (4125278625).

Almost surely, 2^121245040440 is an apocalyptic number.

121245040440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121245040440 is an abundant number, since it is smaller than the sum of its proper divisors (274781707560).

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

121245040440 is a wasteful number, since it uses less digits than its factorization.

121245040440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1692637 (or 1692630 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

Adding to 121245040440 its reverse (44040542121), we get a palindrome (165285582561).

The spelling of 121245040440 in words is "one hundred twenty-one billion, two hundred forty-five million, forty thousand, four hundred forty".