31100003131321 has 8 divisors (see below), whose sum is σ = 31207103733960. Its totient is φ = 30992909041152.

The previous prime is 31100003131289. The next prime is 31100003131331. The reversal of 31100003131321 is 12313130000113.

It can be written as a sum of positive squares in 4 ways, for example, as 128496439296 + 30971506692025 = 358464^2 + 5565205^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31100003131321 - 2⁵ = 31100003131289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31100003131331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8037865 + ... + 11260873.

It is an arithmetic number, because the mean of its divisors is an integer number (3900887966745).

Almost surely, 2^{31100003131321} is an apocalyptic number.

It is an amenable number.

31100003131321 is a deficient number, since it is larger than the sum of its proper divisors (107100602639).

31100003131321 is a wasteful number, since it uses less digits than its factorization.

31100003131321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3256235.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 31100003131321 its reverse (12313130000113), we get a palindrome (43413133131434).

The spelling of 31100003131321 in words is "thirty-one trillion, one hundred billion, three million, one hundred thirty-one thousand, three hundred twenty-one".