20102100220031 has 2 divisors, whose sum is σ = 20102100220032. Its totient is φ = 20102100220030.

The previous prime is 20102100220021. The next prime is 20102100220049. The reversal of 20102100220031 is 13002200120102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20102100220031 - 2⁶ = 20102100219967 is a prime.

It is a super-2 number, since 2×20102100220031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20102100219988 and 20102100220015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20102100220021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051050110015 + 10051050110016.

It is an arithmetic number, because the mean of its divisors is an integer number (10051050110016).

Almost surely, 2^{20102100220031} is an apocalyptic number.

20102100220031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102100220031 is an equidigital number, since it uses as much as digits as its factorization.

20102100220031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20102100220031 its reverse (13002200120102), we get a palindrome (33104300340133).

The spelling of 20102100220031 in words is "twenty trillion, one hundred two billion, one hundred million, two hundred twenty thousand, thirty-one".