31310221332103 has 16 divisors (see below), whose sum is σ = 37586174985216. Its totient is φ = 25500488745600.

The previous prime is 31310221332101. The next prime is 31310221332121. The reversal of 31310221332103 is 30123312201313.

It is a cyclic number.

It is not a de Polignac number, because 31310221332103 - 2¹ = 31310221332101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31310221332101) 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, 643927426 + ... + 643976047.

It is an arithmetic number, because the mean of its divisors is an integer number (2349135936576).

Almost surely, 2^{31310221332103} is an apocalyptic number.

31310221332103 is a deficient number, since it is larger than the sum of its proper divisors (6275953653113).

31310221332103 is a wasteful number, since it uses less digits than its factorization.

31310221332103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287903654.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 31310221332103 its reverse (30123312201313), we get a palindrome (61433533533416).

The spelling of 31310221332103 in words is "thirty-one trillion, three hundred ten billion, two hundred twenty-one million, three hundred thirty-two thousand, one hundred three".