102311221231 has 4 divisors (see below), whose sum is σ = 102359643232. Its totient is φ = 102262799232.

The previous prime is 102311221183. The next prime is 102311221237. The reversal of 102311221231 is 132122113201.

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 102311221231 - 2²³ = 102302832623 is a prime.

It is a super-2 number, since 2×102311221231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102311221199 and 102311221208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102311221237) 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, 24207831 + ... + 24212056.

It is an arithmetic number, because the mean of its divisors is an integer number (25589910808).

Almost surely, 2^102311221231 is an apocalyptic number.

102311221231 is a deficient number, since it is larger than the sum of its proper divisors (48422001).

102311221231 is an equidigital number, since it uses as much as digits as its factorization.

102311221231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48422000.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 102311221231 its reverse (132122113201), we get a palindrome (234433334432).

The spelling of 102311221231 in words is "one hundred two billion, three hundred eleven million, two hundred twenty-one thousand, two hundred thirty-one".