212220100211111 has 2 divisors, whose sum is σ = 212220100211112. Its totient is φ = 212220100211110.

The previous prime is 212220100211081. The next prime is 212220100211117. The reversal of 212220100211111 is 111112001022212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212220100211111 - 2⁶ = 212220100211047 is a prime.

It is a super-2 number, since 2×212220100211111² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212220100211111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212220100211117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106110050105555 + 106110050105556.

It is an arithmetic number, because the mean of its divisors is an integer number (106110050105556).

Almost surely, 2^{212220100211111} is an apocalyptic number.

212220100211111 is a deficient number, since it is larger than the sum of its proper divisors (1).

212220100211111 is an equidigital number, since it uses as much as digits as its factorization.

212220100211111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 212220100211111 its reverse (111112001022212), we get a palindrome (323332101233323).

The spelling of 212220100211111 in words is "two hundred twelve trillion, two hundred twenty billion, one hundred million, two hundred eleven thousand, one hundred eleven".