122121121123 has 4 divisors (see below), whose sum is σ = 123262440120. Its totient is φ = 120979802128.

The previous prime is 122121121121. The next prime is 122121121127. The reversal of 122121121123 is 321121121221.

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 122121121123 - 2¹ = 122121121121 is a prime.

It is a super-2 number, since 2×122121121123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122121121123.

It is not an unprimeable number, because it can be changed into a prime (122121121121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 570659338 + ... + 570659551.

It is an arithmetic number, because the mean of its divisors is an integer number (30815610030).

Almost surely, 2^122121121123 is an apocalyptic number.

122121121123 is a deficient number, since it is larger than the sum of its proper divisors (1141318997).

122121121123 is a wasteful number, since it uses less digits than its factorization.

122121121123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141318996.

The product of its digits is 96, while the sum is 19.

Adding to 122121121123 its reverse (321121121221), we get a palindrome (443242242344).

The spelling of 122121121123 in words is "one hundred twenty-two billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty-three".