1222631100 has 54 divisors (see below), whose sum is σ = 3832272080. Its totient is φ = 326034720.

The previous prime is 1222631089. The next prime is 1222631117. The reversal of 1222631100 is 11362221.

1222631100 is a `hidden beast` number, since 1 + 2 + 22 + 631 + 10 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 678340 + ... + 680139.

Almost surely, 2^1222631100 is an apocalyptic number.

1222631100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222631100 is an abundant number, since it is smaller than the sum of its proper divisors (2609640980).

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

1222631100 is a wasteful number, since it uses less digits than its factorization.

1222631100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358499 (or 1358489 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1222631100 is about 34966.1421949863. The cubic root of 1222631100 is about 1069.2973230249.

Adding to 1222631100 its reverse (11362221), we get a palindrome (1233993321).

The spelling of 1222631100 in words is "one billion, two hundred twenty-two million, six hundred thirty-one thousand, one hundred".