1222021200100 has 36 divisors (see below), whose sum is σ = 2665246889844. Its totient is φ = 486327210880.

The previous prime is 1222021200019. The next prime is 1222021200157. The reversal of 1222021200100 is 10021202221.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 26725056484 + 1195296143616 = 163478^2 + 1093296^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30996067 + ... + 31035466.

It is an arithmetic number, because the mean of its divisors is an integer number (74034635829).

Almost surely, 2^{1222021200100} is an apocalyptic number.

1222021200100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222021200100 is an abundant number, since it is smaller than the sum of its proper divisors (1443225689744).

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

1222021200100 is a wasteful number, since it uses less digits than its factorization.

1222021200100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62031744 (or 62031737 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1222021200100 its reverse (10021202221), we get a palindrome (1232042402321).

The spelling of 1222021200100 in words is "one trillion, two hundred twenty-two billion, twenty-one million, two hundred thousand, one hundred".