121293790553 has 24 divisors (see below), whose sum is σ = 133020064800. Its totient is φ = 110538514944.

The previous prime is 121293790549. The next prime is 121293790619. The reversal of 121293790553 is 355097392121.

It is not a de Polignac number, because 121293790553 - 2² = 121293790549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121293790498 and 121293790507.

It is not an unprimeable number, because it can be changed into a prime (121293792553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6859838 + ... + 6877496.

It is an arithmetic number, because the mean of its divisors is an integer number (5542502700).

Almost surely, 2^121293790553 is an apocalyptic number.

121293790553 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

121293790553 is a deficient number, since it is larger than the sum of its proper divisors (11726274247).

121293790553 is a wasteful number, since it uses less digits than its factorization.

121293790553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18201 (or 18188 counting only the distinct ones).

The product of its (nonzero) digits is 510300, while the sum is 47.

The spelling of 121293790553 in words is "one hundred twenty-one billion, two hundred ninety-three million, seven hundred ninety thousand, five hundred fifty-three".