121101102220 has 48 divisors (see below), whose sum is σ = 297731504448. Its totient is φ = 40507683840.

The previous prime is 121101102209. The next prime is 121101102253. The reversal of 121101102220 is 22201101121.

It is a self number, because there is not a number n which added to its sum of digits gives 121101102220.

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, 10543137 + ... + 10554616.

It is an arithmetic number, because the mean of its divisors is an integer number (6202739676).

Almost surely, 2^121101102220 is an apocalyptic number.

121101102220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121101102220 is an abundant number, since it is smaller than the sum of its proper divisors (176630402228).

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

121101102220 is a wasteful number, since it uses less digits than its factorization.

121101102220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21097810 (or 21097808 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121101102220 its reverse (22201101121), we get a palindrome (143302203341).

The spelling of 121101102220 in words is "one hundred twenty-one billion, one hundred one million, one hundred two thousand, two hundred twenty".