122542343421 has 16 divisors (see below), whose sum is σ = 170519722560. Its totient is φ = 78179790080.

The previous prime is 122542343401. The next prime is 122542343477. The reversal of 122542343421 is 124343245221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 122542343421 - 2¹⁷ = 122542212349 is a prime.

It is a super-2 number, since 2×122542343421² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122542343401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6222615 + ... + 6242276.

It is an arithmetic number, because the mean of its divisors is an integer number (10657482660).

Almost surely, 2^122542343421 is an apocalyptic number.

It is an amenable number.

122542343421 is a deficient number, since it is larger than the sum of its proper divisors (47977379139).

122542343421 is a wasteful number, since it uses less digits than its factorization.

122542343421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12465036.

The product of its digits is 46080, while the sum is 33.

Adding to 122542343421 its reverse (124343245221), we get a palindrome (246885588642).

The spelling of 122542343421 in words is "one hundred twenty-two billion, five hundred forty-two million, three hundred forty-three thousand, four hundred twenty-one".