21122013223111 has 2 divisors, whose sum is σ = 21122013223112. Its totient is φ = 21122013223110.

The previous prime is 21122013223109. The next prime is 21122013223121. The reversal of 21122013223111 is 11132231022112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21122013223111 - 2¹ = 21122013223109 is a prime.

It is a super-2 number, since 2×21122013223111² (a number of 27 digits) contains 22 as substring.

Together with 21122013223109, 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 (21122013223121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561006611555 + 10561006611556.

It is an arithmetic number, because the mean of its divisors is an integer number (10561006611556).

Almost surely, 2^{21122013223111} is an apocalyptic number.

21122013223111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21122013223111 is an equidigital number, since it uses as much as digits as its factorization.

21122013223111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 21122013223111 its reverse (11132231022112), we get a palindrome (32254244245223).

The spelling of 21122013223111 in words is "twenty-one trillion, one hundred twenty-two billion, thirteen million, two hundred twenty-three thousand, one hundred eleven".