102112220 has 24 divisors (see below), whose sum is σ = 245069664. Its totient is φ = 35009856.

The previous prime is 102112211. The next prime is 102112223. The reversal of 102112220 is 22211201.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102112223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364547 + ... + 364826.

It is an arithmetic number, because the mean of its divisors is an integer number (10211236).

Almost surely, 2^102112220 is an apocalyptic number.

102112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102112220 is an abundant number, since it is smaller than the sum of its proper divisors (142957444).

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

102112220 is a wasteful number, since it uses less digits than its factorization.

102112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729389 (or 729387 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 102112220 is about 10105.0591289710. The cubic root of 102112220 is about 467.4041592928.

Adding to 102112220 its reverse (22211201), we get a palindrome (124323421).

The spelling of 102112220 in words is "one hundred two million, one hundred twelve thousand, two hundred twenty".