121022212220 has 144 divisors (see below), whose sum is σ = 332279411520. Its totient is φ = 36048347136.

The previous prime is 121022212217. The next prime is 121022212231. The reversal of 121022212220 is 22212220121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 410936 + ... + 641024.

Almost surely, 2^121022212220 is an apocalyptic number.

121022212220 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 121022212220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166139705760).

121022212220 is an abundant number, since it is smaller than the sum of its proper divisors (211257199300).

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

121022212220 is a wasteful number, since it uses less digits than its factorization.

121022212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230152 (or 230133 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 121022212220 its reverse (22212220121), we get a palindrome (143234432341).

The spelling of 121022212220 in words is "one hundred twenty-one billion, twenty-two million, two hundred twelve thousand, two hundred twenty".