121897725712000 has 192 divisors, whose sum is σ = 352548748623240. Its totient is φ = 41793505689600.

The previous prime is 121897725711989. The next prime is 121897725712001. The reversal of 121897725712000 is 217527798121.

It can be written as a sum of positive squares in 4 ways, for example, as 8965616901696 + 112932108810304 = 2994264^2 + 10626952^2 .

It is not an unprimeable number, because it can be changed into a prime (121897725712001) 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, 76956897 + ... + 78524896.

Almost surely, 2^{121897725712000} is an apocalyptic number.

121897725712000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121897725712000 is an abundant number, since it is smaller than the sum of its proper divisors (230651022911240).

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

121897725712000 is an equidigital number, since it uses as much as digits as its factorization.

121897725712000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155481836 (or 155481807 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 52.

The spelling of 121897725712000 in words is "one hundred twenty-one trillion, eight hundred ninety-seven billion, seven hundred twenty-five million, seven hundred twelve thousand".