102401220 has 24 divisors (see below), whose sum is σ = 286723584. Its totient is φ = 27306976.

The previous prime is 102401219. The next prime is 102401239. The reversal of 102401220 is 22104201.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 102401196 and 102401205.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 853284 + ... + 853403.

It is an arithmetic number, because the mean of its divisors is an integer number (11946816).

Almost surely, 2^102401220 is an apocalyptic number.

102401220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102401220 is an abundant number, since it is smaller than the sum of its proper divisors (184322364).

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

102401220 is a wasteful number, since it uses less digits than its factorization.

102401220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1706699 (or 1706697 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 102401220 is about 10119.3487932772. The cubic root of 102401220 is about 467.8446960763.

Adding to 102401220 its reverse (22104201), we get a palindrome (124505421).

The spelling of 102401220 in words is "one hundred two million, four hundred one thousand, two hundred twenty".