15231123101 has 2 divisors, whose sum is σ = 15231123102. Its totient is φ = 15231123100.

The previous prime is 15231123073. The next prime is 15231123137. The reversal of 15231123101 is 10132113251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13680811225 + 1550311876 = 116965^2 + 39374^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15231123101 is a prime.

It is a super-2 number, since 2×15231123101² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15231123151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7615561550 + 7615561551.

It is an arithmetic number, because the mean of its divisors is an integer number (7615561551).

Almost surely, 2^15231123101 is an apocalyptic number.

It is an amenable number.

15231123101 is a deficient number, since it is larger than the sum of its proper divisors (1).

15231123101 is an equidigital number, since it uses as much as digits as its factorization.

15231123101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 20.

Adding to 15231123101 its reverse (10132113251), we get a palindrome (25363236352).

The spelling of 15231123101 in words is "fifteen billion, two hundred thirty-one million, one hundred twenty-three thousand, one hundred one".