2122211220 has 48 divisors (see below), whose sum is σ = 6102797568. Its totient is φ = 550627200.

The previous prime is 2122211197. The next prime is 2122211243. The reversal of 2122211220 is 221122212.

It is an interprime number because it is at equal distance from previous prime (2122211197) and next prime (2122211243).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2122211220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 475756 + ... + 480195.

It is an arithmetic number, because the mean of its divisors is an integer number (127141616).

Almost surely, 2^2122211220 is an apocalyptic number.

2122211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2122211220 is an abundant number, since it is smaller than the sum of its proper divisors (3980586348).

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

2122211220 is a wasteful number, since it uses less digits than its factorization.

2122211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956000 (or 955998 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 2122211220 is about 46067.4637895337. The cubic root of 2122211220 is about 1285.0781382433.

Adding to 2122211220 its reverse (221122212), we get a palindrome (2343333432).

The spelling of 2122211220 in words is "two billion, one hundred twenty-two million, two hundred eleven thousand, two hundred twenty".