121220122221220 has 48 divisors (see below), whose sum is σ = 278477829705600. Its totient is φ = 43957258776320.

The previous prime is 121220122221181. The next prime is 121220122221307. The reversal of 121220122221220 is 22122221022121.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 121220122221191 and 121220122221200.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 767331265 + ... + 767489224.

It is an arithmetic number, because the mean of its divisors is an integer number (5801621452200).

Almost surely, 2^{121220122221220} is an apocalyptic number.

121220122221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121220122221220 is an abundant number, since it is smaller than the sum of its proper divisors (157257707484380).

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

121220122221220 is a wasteful number, since it uses less digits than its factorization.

121220122221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534820868 (or 1534820866 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 121220122221220 its reverse (22122221022121), we get a palindrome (143342343243341).

The spelling of 121220122221220 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred twenty".