102011115523 has 4 divisors (see below), whose sum is σ = 102072680920. Its totient is φ = 101949550128.

The previous prime is 102011115511. The next prime is 102011115527. The reversal of 102011115523 is 325511110201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 325511110201 = 37 ⋅8797597573.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102011115523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102011115494 and 102011115503.

It is not an unprimeable number, because it can be changed into a prime (102011115527) 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, 30780213 + ... + 30783526.

It is an arithmetic number, because the mean of its divisors is an integer number (25518170230).

Almost surely, 2^102011115523 is an apocalyptic number.

102011115523 is a deficient number, since it is larger than the sum of its proper divisors (61565397).

102011115523 is an equidigital number, since it uses as much as digits as its factorization.

102011115523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61565396.

The product of its (nonzero) digits is 300, while the sum is 22.

Adding to 102011115523 its reverse (325511110201), we get a palindrome (427522225724).

The spelling of 102011115523 in words is "one hundred two billion, eleven million, one hundred fifteen thousand, five hundred twenty-three".