31221302103 has 12 divisors (see below), whose sum is σ = 45543946968. Its totient is φ = 20608119600.

The previous prime is 31221302089. The next prime is 31221302107. The reversal of 31221302103 is 30120312213.

It is not a de Polignac number, because 31221302103 - 2⁶ = 31221302039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31221302107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17172525 + ... + 17174342.

It is an arithmetic number, because the mean of its divisors is an integer number (3795328914).

Almost surely, 2^31221302103 is an apocalyptic number.

31221302103 is a deficient number, since it is larger than the sum of its proper divisors (14322644865).

31221302103 is a wasteful number, since it uses less digits than its factorization.

31221302103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34346974 (or 34346971 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31221302103 its reverse (30120312213), we get a palindrome (61341614316).

The spelling of 31221302103 in words is "thirty-one billion, two hundred twenty-one million, three hundred two thousand, one hundred three".