31023120220103 has 16 divisors (see below), whose sum is σ = 34669736912160. Its totient is φ = 27514260787200.

The previous prime is 31023120220051. The next prime is 31023120220151. The reversal of 31023120220103 is 30102202132013.

It is not a de Polignac number, because 31023120220103 - 2²⁴ = 31023103442887 is a prime.

It is a super-2 number, since 2×31023120220103² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31023120220163) 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, 17241101 + ... + 18955257.

It is an arithmetic number, because the mean of its divisors is an integer number (2166858557010).

Almost surely, 2^{31023120220103} is an apocalyptic number.

31023120220103 is a deficient number, since it is larger than the sum of its proper divisors (3646616692057).

31023120220103 is a wasteful number, since it uses less digits than its factorization.

31023120220103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1754338.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31023120220103 its reverse (30102202132013), we get a palindrome (61125322352116).

The spelling of 31023120220103 in words is "thirty-one trillion, twenty-three billion, one hundred twenty million, two hundred twenty thousand, one hundred three".