1221112210108 has 24 divisors (see below), whose sum is σ = 2443783043072. Its totient is φ = 522999813744.

The previous prime is 1221112210099. The next prime is 1221112210169. The reversal of 1221112210108 is 8010122111221.

It is a happy number.

It is a super-2 number, since 2×1221112210108² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13871616 + ... + 13959367.

Almost surely, 2^{1221112210108} is an apocalyptic number.

It is an amenable number.

1221112210108 is an abundant number, since it is smaller than the sum of its proper divisors (1222670832964).

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

1221112210108 is a wasteful number, since it uses less digits than its factorization.

1221112210108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27832561 (or 27832559 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 22.

Adding to 1221112210108 its reverse (8010122111221), we get a palindrome (9231234321329).

The spelling of 1221112210108 in words is "one trillion, two hundred twenty-one billion, one hundred twelve million, two hundred ten thousand, one hundred eight".