1222102100 has 18 divisors (see below), whose sum is σ = 2651961774. Its totient is φ = 488840800.

The previous prime is 1222102087. The next prime is 1222102109. The reversal of 1222102100 is 12012221.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 14122564 + 1207979536 = 3758^2 + 34756^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222102109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6110411 + ... + 6110610.

Almost surely, 2^1222102100 is an apocalyptic number.

1222102100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222102100 is an abundant number, since it is smaller than the sum of its proper divisors (1429859674).

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

1222102100 is a wasteful number, since it uses less digits than its factorization.

1222102100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12221035 (or 12221028 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1222102100 is about 34958.5769161160. The cubic root of 1222102100 is about 1069.1430819282.

Adding to 1222102100 its reverse (12012221), we get a palindrome (1234114321).

The spelling of 1222102100 in words is "one billion, two hundred twenty-two million, one hundred two thousand, one hundred".