20212211122111 has 2 divisors, whose sum is σ = 20212211122112. Its totient is φ = 20212211122110.

The previous prime is 20212211122109. The next prime is 20212211122219. The reversal of 20212211122111 is 11122111221202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20212211122111 - 2¹ = 20212211122109 is a prime.

Together with 20212211122109, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20212211125111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106105561055 + 10106105561056.

It is an arithmetic number, because the mean of its divisors is an integer number (10106105561056).

Almost surely, 2^{20212211122111} is an apocalyptic number.

20212211122111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212211122111 is an equidigital number, since it uses as much as digits as its factorization.

20212211122111 is an evil number, because the sum of its binary digits is even.

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

Adding to 20212211122111 its reverse (11122111221202), we get a palindrome (31334322343313).

Subtracting from 20212211122111 its reverse (11122111221202), we obtain a palindrome (9090099900909).

The spelling of 20212211122111 in words is "twenty trillion, two hundred twelve billion, two hundred eleven million, one hundred twenty-two thousand, one hundred eleven".