121002211021200 has 120 divisors (see below), whose sum is σ = 398086373305728. Its totient is φ = 31395168253440.

The previous prime is 121002211021199. The next prime is 121002211021267. The reversal of 121002211021200 is 2120112200121.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121002211021200.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1362593112 + ... + 1362681911.

Almost surely, 2^{121002211021200} is an apocalyptic number.

121002211021200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121002211021200 is an abundant number, since it is smaller than the sum of its proper divisors (277084162284528).

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

121002211021200 is a wasteful number, since it uses less digits than its factorization.

121002211021200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2725275081 (or 2725275070 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121002211021200 its reverse (2120112200121), we get a palindrome (123122323221321).

The spelling of 121002211021200 in words is "one hundred twenty-one trillion, two billion, two hundred eleven million, twenty-one thousand, two hundred".