1222313100 has 36 divisors (see below), whose sum is σ = 3536560104. Its totient is φ = 325950080.

The previous prime is 1222313069. The next prime is 1222313101. The reversal of 1222313100 is 13132221.

It is a super-2 number, since 2×1222313100² = 2988098628863220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1222313100.

It is not an unprimeable number, because it can be changed into a prime (1222313101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2036889 + ... + 2037488.

Almost surely, 2^1222313100 is an apocalyptic number.

1222313100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222313100 is an abundant number, since it is smaller than the sum of its proper divisors (2314247004).

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

1222313100 is a wasteful number, since it uses less digits than its factorization.

1222313100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4074394 (or 4074387 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1222313100 is about 34961.5946432653. The cubic root of 1222313100 is about 1069.2046087593.

Adding to 1222313100 its reverse (13132221), we get a palindrome (1235445321).

The spelling of 1222313100 in words is "one billion, two hundred twenty-two million, three hundred thirteen thousand, one hundred".