121099577430 has 256 divisors, whose sum is σ = 338958950400. Its totient is φ = 27432898560.

The previous prime is 121099577419. The next prime is 121099577453. The reversal of 121099577430 is 34775990121.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121099577430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 84154651 + ... + 84156089.

It is an arithmetic number, because the mean of its divisors is an integer number (1324058400).

Almost surely, 2^121099577430 is an apocalyptic number.

121099577430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121099577430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169479475200).

121099577430 is an abundant number, since it is smaller than the sum of its proper divisors (217859372970).

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

121099577430 is a wasteful number, since it uses less digits than its factorization.

121099577430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799.

The product of its (nonzero) digits is 476280, while the sum is 48.

The spelling of 121099577430 in words is "one hundred twenty-one billion, ninety-nine million, five hundred seventy-seven thousand, four hundred thirty".