121100010220 has 36 divisors (see below), whose sum is σ = 295830027360. Its totient is φ = 41520003168.

The previous prime is 121100010211. The next prime is 121100010223. The reversal of 121100010220 is 22010001121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 121100010197 and 121100010206.

It is not an unprimeable number, because it can be changed into a prime (121100010223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61784740 + ... + 61786699.

It is an arithmetic number, because the mean of its divisors is an integer number (8217500760).

Almost surely, 2^121100010220 is an apocalyptic number.

121100010220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121100010220 is an abundant number, since it is smaller than the sum of its proper divisors (174730017140).

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

121100010220 is a wasteful number, since it uses less digits than its factorization.

121100010220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123571462 (or 123571453 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 121100010220 its reverse (22010001121), we get a palindrome (143110011341).

Subtracting from 121100010220 its reverse (22010001121), we obtain a palindrome (99090009099).

The spelling of 121100010220 in words is "one hundred twenty-one billion, one hundred million, ten thousand, two hundred twenty".