211212001010111 has 2 divisors, whose sum is σ = 211212001010112. Its totient is φ = 211212001010110.

The previous prime is 211212001010107. The next prime is 211212001010113. The reversal of 211212001010111 is 111010100212112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211212001010111 - 2² = 211212001010107 is a prime.

It is a super-2 number, since 2×211212001010111² (a number of 29 digits) contains 22 as substring.

Together with 211212001010113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211212001010113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105606000505055 + 105606000505056.

It is an arithmetic number, because the mean of its divisors is an integer number (105606000505056).

Almost surely, 2^{211212001010111} is an apocalyptic number.

211212001010111 is a deficient number, since it is larger than the sum of its proper divisors (1).

211212001010111 is an equidigital number, since it uses as much as digits as its factorization.

211212001010111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 211212001010111 its reverse (111010100212112), we get a palindrome (322222101222223).

The spelling of 211212001010111 in words is "two hundred eleven trillion, two hundred twelve billion, one million, ten thousand, one hundred eleven".