2111220031 has 2 divisors, whose sum is σ = 2111220032. Its totient is φ = 2111220030.

The previous prime is 2111220029. The next prime is 2111220047. The reversal of 2111220031 is 1300221112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2111220031 - 2¹ = 2111220029 is a prime.

It is a super-2 number, since 2×2111220031² = 8914500038591281922, which contains 22 as substring.

Together with 2111220029, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2111219993 and 2111220020.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111220061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055610015 + 1055610016.

It is an arithmetic number, because the mean of its divisors is an integer number (1055610016).

Almost surely, 2^2111220031 is an apocalyptic number.

2111220031 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111220031 is an equidigital number, since it uses as much as digits as its factorization.

2111220031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2111220031 is about 45948.0144402345. The cubic root of 2111220031 is about 1282.8557720628.

Adding to 2111220031 its reverse (1300221112), we get a palindrome (3411441143).

The spelling of 2111220031 in words is "two billion, one hundred eleven million, two hundred twenty thousand, thirty-one".