121954453480 has 64 divisors (see below), whose sum is σ = 276418059840. Its totient is φ = 48423677952.

The previous prime is 121954453459. The next prime is 121954453549. The reversal of 121954453480 is 84354459121.

It is a super-2 number, since 2×121954453480² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121954453480.

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, 3588327 + ... + 3622153.

It is an arithmetic number, because the mean of its divisors is an integer number (4319032185).

Almost surely, 2^121954453480 is an apocalyptic number.

121954453480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121954453480 is an abundant number, since it is smaller than the sum of its proper divisors (154463606360).

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

121954453480 is a wasteful number, since it uses less digits than its factorization.

121954453480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34498 (or 34494 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 46.

The spelling of 121954453480 in words is "one hundred twenty-one billion, nine hundred fifty-four million, four hundred fifty-three thousand, four hundred eighty".