121022002220 has 72 divisors (see below), whose sum is σ = 296412286464. Its totient is φ = 41384792064.

The previous prime is 121022002217. The next prime is 121022002249. The reversal of 121022002220 is 22200220121.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 121022002195 and 121022002204.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 214124 + ... + 536556.

It is an arithmetic number, because the mean of its divisors is an integer number (4116837312).

Almost surely, 2^121022002220 is an apocalyptic number.

121022002220 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 121022002220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148206143232).

121022002220 is an abundant number, since it is smaller than the sum of its proper divisors (175390284244).

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

121022002220 is a wasteful number, since it uses less digits than its factorization.

121022002220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322839 (or 322830 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 121022002220 its reverse (22200220121), we get a palindrome (143222222341).

The spelling of 121022002220 in words is "one hundred twenty-one billion, twenty-two million, two thousand, two hundred twenty".