121102112220 has 192 divisors, whose sum is σ = 388145157120. Its totient is φ = 28016160768.

The previous prime is 121102112179. The next prime is 121102112293. The reversal of 121102112220 is 22211201121.

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 121102112220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 632617 + ... + 801503.

It is an arithmetic number, because the mean of its divisors is an integer number (2021589360).

Almost surely, 2^121102112220 is an apocalyptic number.

121102112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121102112220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194072578560).

121102112220 is an abundant number, since it is smaller than the sum of its proper divisors (267043044900).

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

121102112220 is a wasteful number, since it uses less digits than its factorization.

121102112220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168972 (or 168970 counting only the distinct ones).

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

Adding to 121102112220 its reverse (22211201121), we get a palindrome (143313313341).

The spelling of 121102112220 in words is "one hundred twenty-one billion, one hundred two million, one hundred twelve thousand, two hundred twenty".