1012222100 has 18 divisors (see below), whose sum is σ = 2196522174. Its totient is φ = 404888800.

The previous prime is 1012222087. The next prime is 1012222117. The reversal of 1012222100 is 12222101.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 84897796 + 927324304 = 9214^2 + 30452^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5061011 + ... + 5061210.

Almost surely, 2^1012222100 is an apocalyptic number.

1012222100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012222100 is an abundant number, since it is smaller than the sum of its proper divisors (1184300074).

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

1012222100 is a wasteful number, since it uses less digits than its factorization.

1012222100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10122235 (or 10122228 counting only the distinct ones).

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

The square root of 1012222100 is about 31815.4380765062. The cubic root of 1012222100 is about 1004.0575473752.

Adding to 1012222100 its reverse (12222101), we get a palindrome (1024444201).

Subtracting from 1012222100 its reverse (12222101), we obtain a palindrome (999999999).

The spelling of 1012222100 in words is "one billion, twelve million, two hundred twenty-two thousand, one hundred".