122221220020 has 12 divisors (see below), whose sum is σ = 256664562084. Its totient is φ = 48888488000.

The previous prime is 122221219999. The next prime is 122221220053. The reversal of 122221220020 is 20022122221.

It can be written as a sum of positive squares in 2 ways, for example, as 23236734096 + 98984485924 = 152436^2 + 314618^2 .

It is a junction number, because it is equal to n+sod(n) for n = 122221219976 and 122221220003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3055530481 + ... + 3055530520.

It is an arithmetic number, because the mean of its divisors is an integer number (21388713507).

Almost surely, 2^122221220020 is an apocalyptic number.

122221220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122221220020 is an abundant number, since it is smaller than the sum of its proper divisors (134443342064).

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

122221220020 is a wasteful number, since it uses less digits than its factorization.

122221220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6111061010 (or 6111061008 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 122221220020 its reverse (20022122221), we get a palindrome (142243342241).

The spelling of 122221220020 in words is "one hundred twenty-two billion, two hundred twenty-one million, two hundred twenty thousand, twenty".