212002121212111 has 4 divisors (see below), whose sum is σ = 212023105298352. Its totient is φ = 211981137125872.

The previous prime is 212002121212097. The next prime is 212002121212117. The reversal of 212002121212111 is 111212121200212.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212002121212111 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 (212002121212117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10492027966 + ... + 10492048171.

It is an arithmetic number, because the mean of its divisors is an integer number (53005776324588).

Almost surely, 2^{212002121212111} is an apocalyptic number.

212002121212111 is a deficient number, since it is larger than the sum of its proper divisors (20984086241).

212002121212111 is a wasteful number, since it uses less digits than its factorization.

212002121212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20984086240.

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

Adding to 212002121212111 its reverse (111212121200212), we get a palindrome (323214242412323).

The spelling of 212002121212111 in words is "two hundred twelve trillion, two billion, one hundred twenty-one million, two hundred twelve thousand, one hundred eleven".