31103320311131 has 8 divisors (see below), whose sum is σ = 32559330729120. Its totient is φ = 29655950905152.

The previous prime is 31103320311127. The next prime is 31103320311143. The reversal of 31103320311131 is 13111302330113.

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 31103320311131 - 2² = 31103320311127 is a prime.

It is a super-2 number, since 2×31103320311131² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31103320311097 and 31103320311106.

It is not an unprimeable number, because it can be changed into a prime (31103320311331) 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, 2160245636 + ... + 2160260033.

It is an arithmetic number, because the mean of its divisors is an integer number (4069916341140).

Almost surely, 2^{31103320311131} is an apocalyptic number.

31103320311131 is a deficient number, since it is larger than the sum of its proper divisors (1456010417989).

31103320311131 is a wasteful number, since it uses less digits than its factorization.

31103320311131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4320506005.

The product of its (nonzero) digits is 486, while the sum is 23.

Adding to 31103320311131 its reverse (13111302330113), we get a palindrome (44214622641244).

The spelling of 31103320311131 in words is "thirty-one trillion, one hundred three billion, three hundred twenty million, three hundred eleven thousand, one hundred thirty-one".