2022121220 has 36 divisors (see below), whose sum is σ = 4939755660. Its totient is φ = 693298368.

The previous prime is 2022121177. The next prime is 2022121229. The reversal of 2022121220 is 221212202.

It can be written as a sum of positive squares in 2 ways, for example, as 728568064 + 1293553156 = 26992^2 + 35966^2 .

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 = 2022121195 and 2022121204.

It is not an unprimeable number, because it can be changed into a prime (2022121229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1030715 + ... + 1032674.

It is an arithmetic number, because the mean of its divisors is an integer number (137215435).

Almost surely, 2^2022121220 is an apocalyptic number.

2022121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2022121220 is an abundant number, since it is smaller than the sum of its proper divisors (2917634440).

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

2022121220 is a wasteful number, since it uses less digits than its factorization.

2022121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2063412 (or 2063403 counting only the distinct ones).

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

The square root of 2022121220 is about 44968.0021793275. The cubic root of 2022121220 is about 1264.5491933627.

Adding to 2022121220 its reverse (221212202), we get a palindrome (2243333422).

The spelling of 2022121220 in words is "two billion, twenty-two million, one hundred twenty-one thousand, two hundred twenty".