121210000220000 has 120 divisors (see below), whose sum is σ = 308477362208400. Its totient is φ = 46812137792000.

The previous prime is 121210000219999. The next prime is 121210000220123. The reversal of 121210000220000 is 22000012121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 103911380 + ... + 105071379.

It is an arithmetic number, because the mean of its divisors is an integer number (2570644685070).

Almost surely, 2^{121210000220000} is an apocalyptic number.

121210000220000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121210000220000 is an abundant number, since it is smaller than the sum of its proper divisors (187267361988400).

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

121210000220000 is an equidigital number, since it uses as much as digits as its factorization.

121210000220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208982818 (or 208982795 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 121210000220000 its reverse (22000012121), we get a palindrome (121232000232121).

The spelling of 121210000220000 in words is "one hundred twenty-one trillion, two hundred ten billion, two hundred twenty thousand".