102002111231 has 4 divisors (see below), whose sum is σ = 102014676552. Its totient is φ = 101989545912.

The previous prime is 102002111227. The next prime is 102002111311. The reversal of 102002111231 is 132111200201.

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 102002111231 - 2² = 102002111227 is a prime.

It is a super-2 number, since 2×102002111231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102002111531) 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, 6270476 + ... + 6286721.

It is an arithmetic number, because the mean of its divisors is an integer number (25503669138).

Almost surely, 2^102002111231 is an apocalyptic number.

102002111231 is a deficient number, since it is larger than the sum of its proper divisors (12565321).

102002111231 is an equidigital number, since it uses as much as digits as its factorization.

102002111231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12565320.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 102002111231 its reverse (132111200201), we get a palindrome (234113311432).

The spelling of 102002111231 in words is "one hundred two billion, two million, one hundred eleven thousand, two hundred thirty-one".