121142956440 has 64 divisors (see below), whose sum is σ = 396467861760. Its totient is φ = 29367989120.

The previous prime is 121142956397. The next prime is 121142956457. The reversal of 121142956440 is 44659241121.

It is a super-3 number, since 3×121142956440³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

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, 45886164 + ... + 45888803.

It is an arithmetic number, because the mean of its divisors is an integer number (6194810340).

Almost surely, 2^121142956440 is an apocalyptic number.

121142956440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121142956440 is an abundant number, since it is smaller than the sum of its proper divisors (275324905320).

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

121142956440 is a wasteful number, since it uses less digits than its factorization.

121142956440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91774992 (or 91774988 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The spelling of 121142956440 in words is "one hundred twenty-one billion, one hundred forty-two million, nine hundred fifty-six thousand, four hundred forty".