31003220131223 has 4 divisors (see below), whose sum is σ = 31010794828728. Its totient is φ = 30995645433720.

The previous prime is 31003220131153. The next prime is 31003220131229. The reversal of 31003220131223 is 32213102230013.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31003220131223 - 2¹⁸ = 31003219869079 is a prime.

It is a super-2 number, since 2×31003220131223² (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 (31003220131229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3787342613 + ... + 3787350798.

It is an arithmetic number, because the mean of its divisors is an integer number (7752698707182).

Almost surely, 2^{31003220131223} is an apocalyptic number.

31003220131223 is a deficient number, since it is larger than the sum of its proper divisors (7574697505).

31003220131223 is an equidigital number, since it uses as much as digits as its factorization.

31003220131223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7574697504.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 31003220131223 its reverse (32213102230013), we get a palindrome (63216322361236).

The spelling of 31003220131223 in words is "thirty-one trillion, three billion, two hundred twenty million, one hundred thirty-one thousand, two hundred twenty-three".