121043425540 has 48 divisors (see below), whose sum is σ = 258897300480. Its totient is φ = 47528058240.

The previous prime is 121043425537. The next prime is 121043425621. The reversal of 121043425540 is 45524340121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51925 + ... + 494755.

It is an arithmetic number, because the mean of its divisors is an integer number (5393693760).

Almost surely, 2^121043425540 is an apocalyptic number.

121043425540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121043425540 is an abundant number, since it is smaller than the sum of its proper divisors (137853874940).

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

121043425540 is a wasteful number, since it uses less digits than its factorization.

121043425540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443092 (or 443090 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 121043425540 its reverse (45524340121), we get a palindrome (166567765661).

The spelling of 121043425540 in words is "one hundred twenty-one billion, forty-three million, four hundred twenty-five thousand, five hundred forty".