121201112220 has 24 divisors (see below), whose sum is σ = 339363114384. Its totient is φ = 32320296576.

The previous prime is 121201112209. The next prime is 121201112237. The reversal of 121201112220 is 22211102121.

121201112220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 121201112220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1010009209 + ... + 1010009328.

It is an arithmetic number, because the mean of its divisors is an integer number (14140129766).

Almost surely, 2^121201112220 is an apocalyptic number.

121201112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121201112220 is an abundant number, since it is smaller than the sum of its proper divisors (218162002164).

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

121201112220 is a wasteful number, since it uses less digits than its factorization.

121201112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020018549 (or 2020018547 counting only the distinct ones).

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

Adding to 121201112220 its reverse (22211102121), we get a palindrome (143412214341).

The spelling of 121201112220 in words is "one hundred twenty-one billion, two hundred one million, one hundred twelve thousand, two hundred twenty".