1220102220 has 48 divisors (see below), whose sum is σ = 3450127968. Its totient is φ = 322137600.

The previous prime is 1220102209. The next prime is 1220102237. The reversal of 1220102220 is 222010221.

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 = 1220102196 and 1220102205.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94609 + ... + 106728.

It is an arithmetic number, because the mean of its divisors is an integer number (71877666).

Almost surely, 2^1220102220 is an apocalyptic number.

1220102220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220102220 is an abundant number, since it is smaller than the sum of its proper divisors (2230025748).

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

1220102220 is a wasteful number, since it uses less digits than its factorization.

1220102220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201450 (or 201448 counting only the distinct ones).

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

The square root of 1220102220 is about 34929.9616375398. The cubic root of 1220102220 is about 1068.5595722414.

Adding to 1220102220 its reverse (222010221), we get a palindrome (1442112441).

The spelling of 1220102220 in words is "one billion, two hundred twenty million, one hundred two thousand, two hundred twenty".