121253101421200 has 60 divisors (see below), whose sum is σ = 332926372767040. Its totient is φ = 41572491914880.

The previous prime is 121253101421191. The next prime is 121253101421201. The reversal of 121253101421200 is 2124101352121.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (121253101421201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21652336740 + ... + 21652342339.

Almost surely, 2^{121253101421200} is an apocalyptic number.

121253101421200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121253101421200 is an abundant number, since it is smaller than the sum of its proper divisors (211673271345840).

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

121253101421200 is a wasteful number, since it uses less digits than its factorization.

121253101421200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43304679104 (or 43304679093 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 121253101421200 its reverse (2124101352121), we get a palindrome (123377202773321).

The spelling of 121253101421200 in words is "one hundred twenty-one trillion, two hundred fifty-three billion, one hundred one million, four hundred twenty-one thousand, two hundred".