220121122120 has 16 divisors (see below), whose sum is σ = 495272524860. Its totient is φ = 88048448832.

The previous prime is 220121122093. The next prime is 220121122147. The reversal of 220121122120 is 21221121022.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (220121122093) and next prime (220121122147).

It can be written as a sum of positive squares in 2 ways, for example, as 199864431844 + 20256690276 = 447062^2 + 142326^2 .

It is a junction number, because it is equal to n+sod(n) for n = 220121122094 and 220121122103.

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, 2751513987 + ... + 2751514066.

Almost surely, 2^220121122120 is an apocalyptic number.

220121122120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220121122120 is an abundant number, since it is smaller than the sum of its proper divisors (275151402740).

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

220121122120 is a wasteful number, since it uses less digits than its factorization.

220121122120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5503028064 (or 5503028060 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 220121122120 its reverse (21221121022), we get a palindrome (241342243142).

The spelling of 220121122120 in words is "two hundred twenty billion, one hundred twenty-one million, one hundred twenty-two thousand, one hundred twenty".