100212211222111 has 4 divisors (see below), whose sum is σ = 100875868250224. Its totient is φ = 99548554194000.

The previous prime is 100212211222103. The next prime is 100212211222121. The reversal of 100212211222111 is 111222112212001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100212211222111 - 2³ = 100212211222103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100212211222121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331828513830 + ... + 331828514131.

It is an arithmetic number, because the mean of its divisors is an integer number (25218967062556).

Almost surely, 2^{100212211222111} is an apocalyptic number.

100212211222111 is a deficient number, since it is larger than the sum of its proper divisors (663657028113).

100212211222111 is an equidigital number, since it uses as much as digits as its factorization.

100212211222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663657028112.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 100212211222111 its reverse (111222112212001), we get a palindrome (211434323434112).

The spelling of 100212211222111 in words is "one hundred trillion, two hundred twelve billion, two hundred eleven million, two hundred twenty-two thousand, one hundred eleven".