121120202220 has 96 divisors (see below), whose sum is σ = 341063224320. Its totient is φ = 32115605760.

The previous prime is 121120202219. The next prime is 121120202237. The reversal of 121120202220 is 22202021121.

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 121120202220.

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, 11302665 + ... + 11313375.

It is an arithmetic number, because the mean of its divisors is an integer number (3552741920).

Almost surely, 2^121120202220 is an apocalyptic number.

121120202220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121120202220 is an abundant number, since it is smaller than the sum of its proper divisors (219943022100).

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

121120202220 is a wasteful number, since it uses less digits than its factorization.

121120202220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11775 (or 11773 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 121120202220 its reverse (22202021121), we get a palindrome (143322223341).

The spelling of 121120202220 in words is "one hundred twenty-one billion, one hundred twenty million, two hundred two thousand, two hundred twenty".