122120028221111 has 2 divisors, whose sum is σ = 122120028221112. Its totient is φ = 122120028221110.

The previous prime is 122120028221069. The next prime is 122120028221117. The reversal of 122120028221111 is 111122820021221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 122120028221111 - 2¹⁰ = 122120028220087 is a prime.

It is a super-2 number, since 2×122120028221111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122120028221117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61060014110555 + 61060014110556.

It is an arithmetic number, because the mean of its divisors is an integer number (61060014110556).

Almost surely, 2^{122120028221111} is an apocalyptic number.

122120028221111 is a deficient number, since it is larger than the sum of its proper divisors (1).

122120028221111 is an equidigital number, since it uses as much as digits as its factorization.

122120028221111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 26.

Adding to 122120028221111 its reverse (111122820021221), we get a palindrome (233242848242332).

The spelling of 122120028221111 in words is "one hundred twenty-two trillion, one hundred twenty billion, twenty-eight million, two hundred twenty-one thousand, one hundred eleven".