122011423421 has 4 divisors (see below), whose sum is σ = 122015023452. Its totient is φ = 122007823392.

The previous prime is 122011423411. The next prime is 122011423433. The reversal of 122011423421 is 124324110221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124324110221 = 877 ⋅141760673.

It can be written as a sum of positive squares in 2 ways, for example, as 95613297796 + 26398125625 = 309214^2 + 162475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122011423421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122011423411) 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 3 ways as a sum of consecutive naturals, for example, 1748690 + ... + 1817123.

It is an arithmetic number, because the mean of its divisors is an integer number (30503755863).

Almost surely, 2^122011423421 is an apocalyptic number.

It is an amenable number.

122011423421 is a deficient number, since it is larger than the sum of its proper divisors (3600031).

122011423421 is an equidigital number, since it uses as much as digits as its factorization.

122011423421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3600030.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 122011423421 its reverse (124324110221), we get a palindrome (246335533642).

The spelling of 122011423421 in words is "one hundred twenty-two billion, eleven million, four hundred twenty-three thousand, four hundred twenty-one".