102131222 has 4 divisors (see below), whose sum is σ = 153196836. Its totient is φ = 51065610.

The previous prime is 102131219. The next prime is 102131231. The reversal of 102131222 is 222131201.

It is a happy number.

102131222 is nontrivially palindromic in base 16.

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

It is a junction number, because it is equal to n+sod(n) for n = 102131197 and 102131206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25532804 + ... + 25532807.

It is an arithmetic number, because the mean of its divisors is an integer number (38299209).

Almost surely, 2^102131222 is an apocalyptic number.

102131222 is a deficient number, since it is larger than the sum of its proper divisors (51065614).

102131222 is an equidigital number, since it uses as much as digits as its factorization.

102131222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51065613.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 102131222 is about 10105.9993073421. Note that the first 3 decimals coincide. The cubic root of 102131222 is about 467.4331504784.

Adding to 102131222 its sum of digits (14), we get a square (102131236 = 10106²).

Adding to 102131222 its reverse (222131201), we get a palindrome (324262423).

The spelling of 102131222 in words is "one hundred two million, one hundred thirty-one thousand, two hundred twenty-two".