2212220012121 has 32 divisors (see below), whose sum is σ = 3745894553600. Its totient is φ = 1264012030800.

The previous prime is 2212220012087. The next prime is 2212220012141. The reversal of 2212220012121 is 1212100222122.

It is a happy number.

It is not a de Polignac number, because 2212220012121 - 2¹⁷ = 2212219881049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2212220012094 and 2212220012103.

It is not an unprimeable number, because it can be changed into a prime (2212220012141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1603446 + ... + 2644896.

It is an arithmetic number, because the mean of its divisors is an integer number (117059204800).

Almost surely, 2^{2212220012121} is an apocalyptic number.

2212220012121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2212220012121 is a deficient number, since it is larger than the sum of its proper divisors (1533674541479).

2212220012121 is a wasteful number, since it uses less digits than its factorization.

2212220012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052706 (or 1052700 counting only the distinct ones).

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

Adding to 2212220012121 its reverse (1212100222122), we get a palindrome (3424320234243).

The spelling of 2212220012121 in words is "two trillion, two hundred twelve billion, two hundred twenty million, twelve thousand, one hundred twenty-one".