1212211100988 has 60 divisors (see below), whose sum is σ = 3183978210952. Its totient is φ = 402155318880.

The previous prime is 1212211100987. The next prime is 1212211101041. The reversal of 1212211100988 is 8890011122121.

It is a happy number.

It is a super-2 number, since 2×1212211100988² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212211100981) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 8797495 + ... + 8934222.

Almost surely, 2^{1212211100988} is an apocalyptic number.

1212211100988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1212211100988 is an abundant number, since it is smaller than the sum of its proper divisors (1971767109964).

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

1212211100988 is a wasteful number, since it uses less digits than its factorization.

1212211100988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17731944 (or 17731933 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 36.

The spelling of 1212211100988 in words is "one trillion, two hundred twelve billion, two hundred eleven million, one hundred thousand, nine hundred eighty-eight".