20112113103031 has 2 divisors, whose sum is σ = 20112113103032. Its totient is φ = 20112113103030.

The previous prime is 20112113102987. The next prime is 20112113103157. The reversal of 20112113103031 is 13030131121102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20112113103031 - 2¹⁹ = 20112112578743 is a prime.

It is a super-2 number, since 2×20112113103031² (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 (20112113103931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056056551515 + 10056056551516.

It is an arithmetic number, because the mean of its divisors is an integer number (10056056551516).

Almost surely, 2^{20112113103031} is an apocalyptic number.

20112113103031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20112113103031 is an equidigital number, since it uses as much as digits as its factorization.

20112113103031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 20112113103031 its reverse (13030131121102), we get a palindrome (33142244224133).

The spelling of 20112113103031 in words is "twenty trillion, one hundred twelve billion, one hundred thirteen million, one hundred three thousand, thirty-one".