102123311 has 4 divisors (see below), whose sum is σ = 102171672. Its totient is φ = 102074952.

The previous prime is 102123257. The next prime is 102123337. The reversal of 102123311 is 113321201.

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 102123311 - 2⁶ = 102123247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102123361) 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, 20861 + ... + 25286.

It is an arithmetic number, because the mean of its divisors is an integer number (25542918).

Almost surely, 2^102123311 is an apocalyptic number.

102123311 is a deficient number, since it is larger than the sum of its proper divisors (48361).

102123311 is an equidigital number, since it uses as much as digits as its factorization.

102123311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48360.

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

The square root of 102123311 is about 10105.6078985878. The cubic root of 102123311 is about 467.4210811717.

Adding to 102123311 its reverse (113321201), we get a palindrome (215444512).

The spelling of 102123311 in words is "one hundred two million, one hundred twenty-three thousand, three hundred eleven".