31033220021103 has 4 divisors (see below), whose sum is σ = 41377626694808. Its totient is φ = 20688813347400.

The previous prime is 31033220021093. The next prime is 31033220021129. The reversal of 31033220021103 is 30112002233013.

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

It is not a de Polignac number, because 31033220021103 - 2⁵ = 31033220021071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31033220021103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31033220021183) 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, 5172203336848 + ... + 5172203336853.

It is an arithmetic number, because the mean of its divisors is an integer number (10344406673702).

Almost surely, 2^{31033220021103} is an apocalyptic number.

31033220021103 is a deficient number, since it is larger than the sum of its proper divisors (10344406673705).

31033220021103 is a wasteful number, since it uses less digits than its factorization.

31033220021103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10344406673704.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31033220021103 its reverse (30112002233013), we get a palindrome (61145222254116).

The spelling of 31033220021103 in words is "thirty-one trillion, thirty-three billion, two hundred twenty million, twenty-one thousand, one hundred three".