1012221222100 has 72 divisors (see below), whose sum is σ = 2436817471200. Its totient is φ = 361841769600.

The previous prime is 1012221222083. The next prime is 1012221222137. The reversal of 1012221222100 is 12221222101.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7733415 + ... + 7863214.

It is an arithmetic number, because the mean of its divisors is an integer number (33844687100).

Almost surely, 2^{1012221222100} is an apocalyptic number.

1012221222100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012221222100 is an abundant number, since it is smaller than the sum of its proper divisors (1424596249100).

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

1012221222100 is a wasteful number, since it uses less digits than its factorization.

1012221222100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15596713 (or 15596706 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1012221222100 its reverse (12221222101), we get a palindrome (1024442444201).

Subtracting from 1012221222100 its reverse (12221222101), we obtain a palindrome (999999999999).

It can be divided in two parts, 1012221 and 222100, that added together give a palindrome (1234321).

The spelling of 1012221222100 in words is "one trillion, twelve billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred".