31103023213033 has 4 divisors (see below), whose sum is σ = 31150077711748. Its totient is φ = 31055968714320.

The previous prime is 31103023213007. The next prime is 31103023213049. The reversal of 31103023213033 is 33031232030113.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10687328645904 + 20415694567129 = 3269148^2 + 4518373^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31103023213033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31103023212989 and 31103023213007.

It is not an unprimeable number, because it can be changed into a prime (31103023213133) 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, 23527248366 + ... + 23527249687.

It is an arithmetic number, because the mean of its divisors is an integer number (7787519427937).

Almost surely, 2^{31103023213033} is an apocalyptic number.

It is an amenable number.

31103023213033 is a deficient number, since it is larger than the sum of its proper divisors (47054498715).

31103023213033 is an equidigital number, since it uses as much as digits as its factorization.

31103023213033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47054498714.

The product of its (nonzero) digits is 2916, while the sum is 25.

Adding to 31103023213033 its reverse (33031232030113), we get a palindrome (64134255243146).

The spelling of 31103023213033 in words is "thirty-one trillion, one hundred three billion, twenty-three million, two hundred thirteen thousand, thirty-three".