20100220312031 has 2 divisors, whose sum is σ = 20100220312032. Its totient is φ = 20100220312030.

The previous prime is 20100220312021. The next prime is 20100220312037. The reversal of 20100220312031 is 13021302200102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20100220312031 - 2⁶ = 20100220311967 is a prime.

It is a super-2 number, since 2×20100220312031² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20100220312037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050110156015 + 10050110156016.

It is an arithmetic number, because the mean of its divisors is an integer number (10050110156016).

Almost surely, 2^{20100220312031} is an apocalyptic number.

20100220312031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20100220312031 is an equidigital number, since it uses as much as digits as its factorization.

20100220312031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20100220312031 its reverse (13021302200102), we get a palindrome (33121522512133).

The spelling of 20100220312031 in words is "twenty trillion, one hundred billion, two hundred twenty million, three hundred twelve thousand, thirty-one".