102012311 has 4 divisors (see below), whose sum is σ = 107381400. Its totient is φ = 96643224.

The previous prime is 102012301. The next prime is 102012319. The reversal of 102012311 is 113210201.

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 102012311 - 2⁶ = 102012247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102012292 and 102012301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102012319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2684516 + ... + 2684553.

It is an arithmetic number, because the mean of its divisors is an integer number (26845350).

Almost surely, 2^102012311 is an apocalyptic number.

102012311 is a deficient number, since it is larger than the sum of its proper divisors (5369089).

102012311 is an equidigital number, since it uses as much as digits as its factorization.

102012311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5369088.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 102012311 is about 10100.1144052926. The cubic root of 102012311 is about 467.2516698045.

Adding to 102012311 its reverse (113210201), we get a palindrome (215222512).

It can be divided in two parts, 1020 and 12311, that added together give a palindrome (13331).

The spelling of 102012311 in words is "one hundred two million, twelve thousand, three hundred eleven".