122001020121111 has 4 divisors (see below), whose sum is σ = 162668026828152. Its totient is φ = 81334013414072.

The previous prime is 122001020121109. The next prime is 122001020121259. The reversal of 122001020121111 is 111121020100221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 122001020121111 - 2¹ = 122001020121109 is a prime.

It is a super-2 number, since 2×122001020121111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122001020121611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20333503353516 + ... + 20333503353521.

It is an arithmetic number, because the mean of its divisors is an integer number (40667006707038).

Almost surely, 2^{122001020121111} is an apocalyptic number.

122001020121111 is a deficient number, since it is larger than the sum of its proper divisors (40667006707041).

122001020121111 is an equidigital number, since it uses as much as digits as its factorization.

122001020121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40667006707040.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 122001020121111 its reverse (111121020100221), we get a palindrome (233122040221332).

The spelling of 122001020121111 in words is "one hundred twenty-two trillion, one billion, twenty million, one hundred twenty-one thousand, one hundred eleven".