31000012103 has 2 divisors, whose sum is σ = 31000012104. Its totient is φ = 31000012102.

The previous prime is 31000012067. The next prime is 31000012123. The reversal of 31000012103 is 30121000013.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31000012103 - 2¹⁰ = 31000011079 is a prime.

It is a super-2 number, since 2×31000012103² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31000012123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15500006051 + 15500006052.

It is an arithmetic number, because the mean of its divisors is an integer number (15500006052).

Almost surely, 2^31000012103 is an apocalyptic number.

31000012103 is a deficient number, since it is larger than the sum of its proper divisors (1).

31000012103 is an equidigital number, since it uses as much as digits as its factorization.

31000012103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 11.

Adding to 31000012103 its reverse (30121000013), we get a palindrome (61121012116).

The spelling of 31000012103 in words is "thirty-one billion, twelve thousand, one hundred three".