91003131303131 has 4 divisors (see below), whose sum is σ = 91411217093952. Its totient is φ = 90595045512312.

The previous prime is 91003131303059. The next prime is 91003131303191. The reversal of 91003131303131 is 13130313130019.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91003131303131 is a prime.

It is a super-2 number, since 2×91003131303131² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91003131303094 and 91003131303103.

It is not an unprimeable number, because it can be changed into a prime (91003131303191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204042895076 + ... + 204042895521.

It is an arithmetic number, because the mean of its divisors is an integer number (22852804273488).

Almost surely, 2^{91003131303131} is an apocalyptic number.

91003131303131 is a deficient number, since it is larger than the sum of its proper divisors (408085790821).

91003131303131 is a wasteful number, since it uses less digits than its factorization.

91003131303131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408085790820.

The product of its (nonzero) digits is 2187, while the sum is 29.

The spelling of 91003131303131 in words is "ninety-one trillion, three billion, one hundred thirty-one million, three hundred three thousand, one hundred thirty-one".