2122111220 has 12 divisors (see below), whose sum is σ = 4456433604. Its totient is φ = 848844480.

The previous prime is 2122111183. The next prime is 2122111223. The reversal of 2122111220 is 221112212.

It can be written as a sum of positive squares in 2 ways, for example, as 580135396 + 1541975824 = 24086^2 + 39268^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2122111195 and 2122111204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122111223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53052761 + ... + 53052800.

It is an arithmetic number, because the mean of its divisors is an integer number (371369467).

Almost surely, 2^2122111220 is an apocalyptic number.

2122111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2122111220 is an abundant number, since it is smaller than the sum of its proper divisors (2334322384).

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

2122111220 is a wasteful number, since it uses less digits than its factorization.

2122111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106105570 (or 106105568 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 2122111220 is about 46066.3784120263. The cubic root of 2122111220 is about 1285.0579533483.

Adding to 2122111220 its reverse (221112212), we get a palindrome (2343223432).

The spelling of 2122111220 in words is "two billion, one hundred twenty-two million, one hundred eleven thousand, two hundred twenty".