2120112221031 has 20 divisors (see below), whose sum is σ = 3619521394192. Its totient is φ = 1211492697408.

The previous prime is 2120112220949. The next prime is 2120112221053. The reversal of 2120112221031 is 1301222110212.

It is not a de Polignac number, because 2120112221031 - 2⁷ = 2120112220903 is a prime.

It is a super-2 number, since 2×2120112221031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120112220995 and 2120112221013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120112221131) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1869586930 + ... + 1869588063.

Almost surely, 2^{2120112221031} is an apocalyptic number.

2120112221031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2120112221031 is a deficient number, since it is larger than the sum of its proper divisors (1499409173161).

2120112221031 is an equidigital number, since it uses as much as digits as its factorization.

2120112221031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3739175012 (or 3739175003 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 2120112221031 its reverse (1301222110212), we get a palindrome (3421334331243).

The spelling of 2120112221031 in words is "two trillion, one hundred twenty billion, one hundred twelve million, two hundred twenty-one thousand, thirty-one".