122121120111 has 16 divisors (see below), whose sum is σ = 163681033824. Its totient is φ = 80987777024.

The previous prime is 122121120089. The next prime is 122121120119. The reversal of 122121120111 is 111021121221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 122121120111 - 2²¹ = 122119022959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122121120119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4876855 + ... + 4901831.

It is an arithmetic number, because the mean of its divisors is an integer number (10230064614).

Almost surely, 2^122121120111 is an apocalyptic number.

122121120111 is a deficient number, since it is larger than the sum of its proper divisors (41559913713).

122121120111 is a wasteful number, since it uses less digits than its factorization.

122121120111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33450.

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

Adding to 122121120111 its reverse (111021121221), we get a palindrome (233142241332).

The spelling of 122121120111 in words is "one hundred twenty-two billion, one hundred twenty-one million, one hundred twenty thousand, one hundred eleven".