1212011100108 has 48 divisors (see below), whose sum is σ = 3193763329120. Its totient is φ = 397380686400.

The previous prime is 1212011100067. The next prime is 1212011100109. The reversal of 1212011100108 is 8010011102121.

It is a super-2 number, since 2×1212011100108² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1212011100109) 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 15 ways as a sum of consecutive naturals, for example, 91979683 + ... + 91992858.

Almost surely, 2^{1212011100108} is an apocalyptic number.

1212011100108 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1212011100108 is an abundant number, since it is smaller than the sum of its proper divisors (1981752229012).

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

1212011100108 is a wasteful number, since it uses less digits than its factorization.

1212011100108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183972615 (or 183972607 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 1212011100108 its reverse (8010011102121), we get a palindrome (9222022202229).

The spelling of 1212011100108 in words is "one trillion, two hundred twelve billion, eleven million, one hundred thousand, one hundred eight".