2112221031 has 32 divisors (see below), whose sum is σ = 3058145280. Its totient is φ = 1293287424.

The previous prime is 2112221021. The next prime is 2112221057. The reversal of 2112221031 is 1301222112.

It is not a de Polignac number, because 2112221031 - 2⁶ = 2112220967 is a prime.

It is a super-2 number, since 2×2112221031² = 8922955367597405922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2112221031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112221011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 165735 + ... + 178023.

It is an arithmetic number, because the mean of its divisors is an integer number (95567040).

Almost surely, 2^2112221031 is an apocalyptic number.

2112221031 is a deficient number, since it is larger than the sum of its proper divisors (945924249).

2112221031 is a wasteful number, since it uses less digits than its factorization.

2112221031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12415.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 2112221031 is about 45958.9058942878. The cubic root of 2112221031 is about 1283.0584882982.

Adding to 2112221031 its reverse (1301222112), we get a palindrome (3413443143).

The spelling of 2112221031 in words is "two billion, one hundred twelve million, two hundred twenty-one thousand, thirty-one".