2012021211111 has 4 divisors (see below), whose sum is σ = 2682694948152. Its totient is φ = 1341347474072.

The previous prime is 2012021211091. The next prime is 2012021211131. The reversal of 2012021211111 is 1111121202102.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (2012021211091) and next prime (2012021211131).

It is a cyclic number.

It is not a de Polignac number, because 2012021211111 - 2³⁰ = 2010947469287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012021211131) 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, 335336868516 + ... + 335336868521.

It is an arithmetic number, because the mean of its divisors is an integer number (670673737038).

Almost surely, 2^{2012021211111} is an apocalyptic number.

2012021211111 is a deficient number, since it is larger than the sum of its proper divisors (670673737041).

2012021211111 is an equidigital number, since it uses as much as digits as its factorization.

2012021211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670673737040.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2012021211111 its reverse (1111121202102), we get a palindrome (3123142413213).

Subtracting from 2012021211111 its reverse (1111121202102), we obtain a palindrome (900900009009).

The spelling of 2012021211111 in words is "two trillion, twelve billion, twenty-one million, two hundred eleven thousand, one hundred eleven".