2101210031 has 2 divisors, whose sum is σ = 2101210032. Its totient is φ = 2101210030.

The previous prime is 2101210009. The next prime is 2101210043. The reversal of 2101210031 is 1300121012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2101210031 - 2⁶ = 2101209967 is a prime.

It is a super-2 number, since 2×2101210031² = 8830167188750041922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2101209994 and 2101210021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101210831) 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 as a sum of consecutive naturals, namely, 1050605015 + 1050605016.

It is an arithmetic number, because the mean of its divisors is an integer number (1050605016).

Almost surely, 2^2101210031 is an apocalyptic number.

2101210031 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101210031 is an equidigital number, since it uses as much as digits as its factorization.

2101210031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 2101210031 is about 45838.9575688628. The cubic root of 2101210031 is about 1280.8250765692.

Adding to 2101210031 its reverse (1300121012), we get a palindrome (3401331043).

The spelling of 2101210031 in words is "two billion, one hundred one million, two hundred ten thousand, thirty-one".