1011212211100 has 108 divisors (see below), whose sum is σ = 2748941676264. Its totient is φ = 320031976320.

The previous prime is 1011212211091. The next prime is 1011212211103. The reversal of 1011212211100 is 11122121101.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011212211103) 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 35 ways as a sum of consecutive naturals, for example, 7873602 + ... + 8001001.

Almost surely, 2^{1011212211100} is an apocalyptic number.

1011212211100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011212211100 is an abundant number, since it is smaller than the sum of its proper divisors (1737729465164).

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

1011212211100 is a wasteful number, since it uses less digits than its factorization.

1011212211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15874644 (or 15874630 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1011212211100 its reverse (11122121101), we get a palindrome (1022334332201).

The spelling of 1011212211100 in words is "one trillion, eleven billion, two hundred twelve million, two hundred eleven thousand, one hundred".