1222010100 has 108 divisors (see below), whose sum is σ = 3933952204. Its totient is φ = 317053440.

The previous prime is 1222010093. The next prime is 1222010147. The reversal of 1222010100 is 10102221.

It can be written as a sum of positive squares in 6 ways, for example, as 5116644 + 1216893456 = 2262^2 + 34884^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 14952 + ... + 51648.

Almost surely, 2^1222010100 is an apocalyptic number.

1222010100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222010100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1966976102).

1222010100 is an abundant number, since it is smaller than the sum of its proper divisors (2711942104).

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

1222010100 is a wasteful number, since it uses less digits than its factorization.

1222010100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36754 (or 36744 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1222010100 is about 34957.2610483144. The cubic root of 1222010100 is about 1069.1162528463.

Adding to 1222010100 its reverse (10102221), we get a palindrome (1232112321).

The spelling of 1222010100 in words is "one billion, two hundred twenty-two million, ten thousand, one hundred".