1031320515101 has 16 divisors (see below), whose sum is σ = 1115282359296. Its totient is φ = 949949412096.

The previous prime is 1031320515073. The next prime is 1031320515133. The reversal of 1031320515101 is 1015150231301.

It is a cyclic number.

It is not a de Polignac number, because 1031320515101 - 2¹⁸ = 1031320252957 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 (1031320511101) 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, 27144620 + ... + 27182586.

It is an arithmetic number, because the mean of its divisors is an integer number (69705147456).

Almost surely, 2^{1031320515101} is an apocalyptic number.

It is an amenable number.

1031320515101 is a deficient number, since it is larger than the sum of its proper divisors (83961844195).

1031320515101 is a wasteful number, since it uses less digits than its factorization.

1031320515101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72028.

The product of its (nonzero) digits is 450, while the sum is 23.

Adding to 1031320515101 its reverse (1015150231301), we get a palindrome (2046470746402).

The spelling of 1031320515101 in words is "one trillion, thirty-one billion, three hundred twenty million, five hundred fifteen thousand, one hundred one".