102311123 has 4 divisors (see below), whose sum is σ = 102446328. Its totient is φ = 102175920.

The previous prime is 102311119. The next prime is 102311137. The reversal of 102311123 is 321113201.

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

It is a cyclic number.

It is not a de Polignac number, because 102311123 - 2² = 102311119 is a prime.

It is a super-2 number, since 2×102311123² = 20935131779042258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102311098 and 102311107.

It is not an unprimeable number, because it can be changed into a prime (102317123) 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, 66461 + ... + 67982.

It is an arithmetic number, because the mean of its divisors is an integer number (25611582).

Almost surely, 2^102311123 is an apocalyptic number.

102311123 is a deficient number, since it is larger than the sum of its proper divisors (135205).

102311123 is an equidigital number, since it uses as much as digits as its factorization.

102311123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135204.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 102311123 is about 10114.8960943749. The cubic root of 102311123 is about 467.7074458501.

Adding to 102311123 its reverse (321113201), we get a palindrome (423424324).

The spelling of 102311123 in words is "one hundred two million, three hundred eleven thousand, one hundred twenty-three".