121100210220 has 96 divisors (see below), whose sum is σ = 369989867520. Its totient is φ = 29350978560.

The previous prime is 121100210177. The next prime is 121100210233. The reversal of 121100210220 is 22012001121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 121100210196 and 121100210205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3296916 + ... + 3333444.

It is an arithmetic number, because the mean of its divisors is an integer number (3854061120).

Almost surely, 2^121100210220 is an apocalyptic number.

121100210220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121100210220 is an abundant number, since it is smaller than the sum of its proper divisors (248889657300).

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

121100210220 is a wasteful number, since it uses less digits than its factorization.

121100210220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41575 (or 41573 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121100210220 its reverse (22012001121), we get a palindrome (143112211341).

The spelling of 121100210220 in words is "one hundred twenty-one billion, one hundred million, two hundred ten thousand, two hundred twenty".