212111120100001 has 4 divisors (see below), whose sum is σ = 212111703559872. Its totient is φ = 212110536640132.

The previous prime is 212111120099981. The next prime is 212111120100037. The reversal of 212111120100001 is 100001021111212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212111120100001 - 2²⁵ = 212111086545569 is a prime.

It is a super-2 number, since 2×212111120100001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212111120100301) 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, 291184285 + ... + 291911818.

It is an arithmetic number, because the mean of its divisors is an integer number (53027925889968).

Almost surely, 2^{212111120100001} is an apocalyptic number.

It is an amenable number.

212111120100001 is a deficient number, since it is larger than the sum of its proper divisors (583459871).

212111120100001 is an equidigital number, since it uses as much as digits as its factorization.

212111120100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583459870.

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

Adding to 212111120100001 its reverse (100001021111212), we get a palindrome (312112141211213).

The spelling of 212111120100001 in words is "two hundred twelve trillion, one hundred eleven billion, one hundred twenty million, one hundred thousand, one".