102312220 has 24 divisors (see below), whose sum is σ = 220097808. Its totient is φ = 39926400.

The previous prime is 102312209. The next prime is 102312227. The reversal of 102312220 is 22213201.

It is a super-2 number, since 2×102312220² = 20935580722656800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 102312220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102312227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61566 + ... + 63205.

It is an arithmetic number, because the mean of its divisors is an integer number (9170742).

Almost surely, 2^102312220 is an apocalyptic number.

102312220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102312220 is an abundant number, since it is smaller than the sum of its proper divisors (117785588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102312220 is a wasteful number, since it uses less digits than its factorization.

102312220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124821 (or 124819 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 102312220 is about 10114.9503211830. The cubic root of 102312220 is about 467.7091174612.

Adding to 102312220 its reverse (22213201), we get a palindrome (124525421).

The spelling of 102312220 in words is "one hundred two million, three hundred twelve thousand, two hundred twenty".