2112210212220 has 48 divisors (see below), whose sum is σ = 6571320661920. Its totient is φ = 563256056448.

The previous prime is 2112210212219. The next prime is 2112210212221. The reversal of 2112210212220 is 222120122112.

It is a happy number.

2112210212220 is a `hidden beast` number, since 2 + 11 + 221 + 0 + 212 + 220 = 666.

It is an interprime number because it is at equal distance from previous prime (2112210212219) and next prime (2112210212221).

It is a super-2 number, since 2×2112210212220² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2112210212193 and 2112210212202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112210212221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1955749657 + ... + 1955750736.

It is an arithmetic number, because the mean of its divisors is an integer number (136902513790).

Almost surely, 2^{2112210212220} is an apocalyptic number.

2112210212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2112210212220 is an abundant number, since it is smaller than the sum of its proper divisors (4459110449700).

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

2112210212220 is a wasteful number, since it uses less digits than its factorization.

2112210212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3911500411 (or 3911500403 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2112210212220 its reverse (222120122112), we get a palindrome (2334330334332).

The spelling of 2112210212220 in words is "two trillion, one hundred twelve billion, two hundred ten million, two hundred twelve thousand, two hundred twenty".