121200121021210 has 64 divisors (see below), whose sum is σ = 273660622516224. Its totient is φ = 37544902401600.

The previous prime is 121200121021207. The next prime is 121200121021247. The reversal of 121200121021210 is 12120121002121.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 482705026 + ... + 482956045.

It is an arithmetic number, because the mean of its divisors is an integer number (4275947226816).

Almost surely, 2^{121200121021210} is an apocalyptic number.

121200121021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121200121021210 is an abundant number, since it is smaller than the sum of its proper divisors (152460501495014).

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

121200121021210 is a wasteful number, since it uses less digits than its factorization.

121200121021210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965661259.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121200121021210 its reverse (12120121002121), we get a palindrome (133320242023331).

The spelling of 121200121021210 in words is "one hundred twenty-one trillion, two hundred billion, one hundred twenty-one million, twenty-one thousand, two hundred ten".