121000006925856 has 72 divisors (see below), whose sum is σ = 344620713216780. Its totient is φ = 40271569368576.

The previous prime is 121000006925851. The next prime is 121000006925857. The reversal of 121000006925856 is 658529600000121.

121000006925856 is a `hidden beast` number, since 1 + 2 + 1 + 0 + 0 + 0 + 0 + 0 + 69 + 2 + 585 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 119064847715856 + 1935159210000 = 10911684^2 + 1391100^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (121000006925851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 321510951 + ... + 321887078.

Almost surely, 2^{121000006925856} is an apocalyptic number.

121000006925856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121000006925856 is an abundant number, since it is smaller than the sum of its proper divisors (223620706290924).

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

121000006925856 is a wasteful number, since it uses less digits than its factorization.

121000006925856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643398698 (or 643398687 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

Adding to 121000006925856 its reverse (658529600000121), we get a palindrome (779529606925977).

The spelling of 121000006925856 in words is "one hundred twenty-one trillion, six million, nine hundred twenty-five thousand, eight hundred fifty-six".