2122122220 has 12 divisors (see below), whose sum is σ = 4456456704. Its totient is φ = 848848880.

The previous prime is 2122122137. The next prime is 2122122221. The reversal of 2122122220 is 222212212.

It is a junction number, because it is equal to n+sod(n) for n = 2122122194 and 2122122203.

It is not an unprimeable number, because it can be changed into a prime (2122122221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53053036 + ... + 53053075.

It is an arithmetic number, because the mean of its divisors is an integer number (371371392).

Almost surely, 2^2122122220 is an apocalyptic number.

2122122220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2122122220 is an abundant number, since it is smaller than the sum of its proper divisors (2334334484).

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

2122122220 is a wasteful number, since it uses less digits than its factorization.

2122122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106106120 (or 106106118 counting only the distinct ones).

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

The square root of 2122122220 is about 46066.4978048039. The cubic root of 2122122220 is about 1285.0601737178.

Adding to 2122122220 its reverse (222212212), we get a palindrome (2344334432).

The spelling of 2122122220 in words is "two billion, one hundred twenty-two million, one hundred twenty-two thousand, two hundred twenty".