31011120103 has 16 divisors (see below), whose sum is σ = 32805884160. Its totient is φ = 29266617600.

The previous prime is 31011120089. The next prime is 31011120121. The reversal of 31011120103 is 30102111013.

It is a cyclic number.

It is not a de Polignac number, because 31011120103 - 2²¹ = 31009022951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31011120143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4975393 + ... + 4981621.

It is an arithmetic number, because the mean of its divisors is an integer number (2050367760).

Almost surely, 2^31011120103 is an apocalyptic number.

31011120103 is a deficient number, since it is larger than the sum of its proper divisors (1794764057).

31011120103 is a wasteful number, since it uses less digits than its factorization.

31011120103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10218.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 31011120103 its reverse (30102111013), we get a palindrome (61113231116).

The spelling of 31011120103 in words is "thirty-one billion, eleven million, one hundred twenty thousand, one hundred three".