1222402100 has 18 divisors (see below), whose sum is σ = 2652612774. Its totient is φ = 488960800.

The previous prime is 1222402099. The next prime is 1222402117. The reversal of 1222402100 is 12042221.

It can be written as a sum of positive squares in 3 ways, for example, as 84419344 + 1137982756 = 9188^2 + 33734^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6111911 + ... + 6112110.

Almost surely, 2^1222402100 is an apocalyptic number.

1222402100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222402100 is an abundant number, since it is smaller than the sum of its proper divisors (1430210674).

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

1222402100 is a wasteful number, since it uses less digits than its factorization.

1222402100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12224035 (or 12224028 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1222402100 is about 34962.8674453341. The cubic root of 1222402100 is about 1069.2305587118.

Adding to 1222402100 its reverse (12042221), we get a palindrome (1234444321).

The spelling of 1222402100 in words is "one billion, two hundred twenty-two million, four hundred two thousand, one hundred".