1212110221100 has 18 divisors (see below), whose sum is σ = 2630279180004. Its totient is φ = 484844088400.

The previous prime is 1212110221087. The next prime is 1212110221163. The reversal of 1212110221100 is 11220112121.

It is a super-2 number, since 2×1212110221100² (a number of 25 digits) contains 22 as substring.

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, 6060551006 + ... + 6060551205.

Almost surely, 2^{1212110221100} is an apocalyptic number.

1212110221100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212110221100 is an abundant number, since it is smaller than the sum of its proper divisors (1418168958904).

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

1212110221100 is a wasteful number, since it uses less digits than its factorization.

1212110221100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12121102225 (or 12121102218 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1212110221100 its reverse (11220112121), we get a palindrome (1223330333221).

The spelling of 1212110221100 in words is "one trillion, two hundred twelve billion, one hundred ten million, two hundred twenty-one thousand, one hundred".