121309492858488 has 384 divisors, whose sum is σ = 396360439948800. Its totient is φ = 34027893504000.

The previous prime is 121309492858481. The next prime is 121309492858501. The reversal of 121309492858488 is 884858294903121.

121309492858488 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 0 + 9 + 4 + 92 + 8 + 58 + 488 = 666.

It is a super-2 number, since 2×121309492858488² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121309492858481) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 51361768 + ... + 53671688.

It is an arithmetic number, because the mean of its divisors is an integer number (1032188645700).

Almost surely, 2^{121309492858488} is an apocalyptic number.

121309492858488 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121309492858488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198180219974400).

121309492858488 is an abundant number, since it is smaller than the sum of its proper divisors (275050947090312).

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

121309492858488 is a wasteful number, since it uses less digits than its factorization.

121309492858488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2310032 (or 2309991 counting only the distinct ones).

The product of its (nonzero) digits is 318504960, while the sum is 72.

The spelling of 121309492858488 in words is "one hundred twenty-one trillion, three hundred nine billion, four hundred ninety-two million, eight hundred fifty-eight thousand, four hundred eighty-eight".