101131313123 has 4 divisors (see below), whose sum is σ = 101160285768. Its totient is φ = 101102340480.

The previous prime is 101131313117. The next prime is 101131313147. The reversal of 101131313123 is 321313131101.

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-101131313123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101131313095 and 101131313104.

It is not an unprimeable number, because it can be changed into a prime (101131313183) 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, 14481086 + ... + 14488067.

It is an arithmetic number, because the mean of its divisors is an integer number (25290071442).

Almost surely, 2^101131313123 is an apocalyptic number.

101131313123 is a deficient number, since it is larger than the sum of its proper divisors (28972645).

101131313123 is an equidigital number, since it uses as much as digits as its factorization.

101131313123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28972644.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 101131313123 its reverse (321313131101), we get a palindrome (422444444224).

The spelling of 101131313123 in words is "one hundred one billion, one hundred thirty-one million, three hundred thirteen thousand, one hundred twenty-three".