31321311203 has 16 divisors (see below), whose sum is σ = 38558128896. Its totient is φ = 24776025120.

The previous prime is 31321311181. The next prime is 31321311233. The reversal of 31321311203 is 30211312313.

It is not a de Polignac number, because 31321311203 - 2¹⁶ = 31321245667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31321311233) 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, 385448 + ... + 459578.

It is an arithmetic number, because the mean of its divisors is an integer number (2409883056).

Almost surely, 2^31321311203 is an apocalyptic number.

31321311203 is a deficient number, since it is larger than the sum of its proper divisors (7236817693).

31321311203 is a wasteful number, since it uses less digits than its factorization.

31321311203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78794.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31321311203 its reverse (30211312313), we get a palindrome (61532623516).

The spelling of 31321311203 in words is "thirty-one billion, three hundred twenty-one million, three hundred eleven thousand, two hundred three".