121399202925 has 192 divisors, whose sum is σ = 299434168320. Its totient is φ = 46570464000.

The previous prime is 121399202923. The next prime is 121399202933. The reversal of 121399202925 is 529202993121.

It is not a de Polignac number, because 121399202925 - 2¹ = 121399202923 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121399202923) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 585840 + ... + 765510.

It is an arithmetic number, because the mean of its divisors is an integer number (1559552960).

Almost surely, 2^121399202925 is an apocalyptic number.

121399202925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121399202925 is an abundant number, since it is smaller than the sum of its proper divisors (178034965395).

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

121399202925 is a wasteful number, since it uses less digits than its factorization.

121399202925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179721 (or 179710 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The spelling of 121399202925 in words is "one hundred twenty-one billion, three hundred ninety-nine million, two hundred two thousand, nine hundred twenty-five".