122105421 has 32 divisors (see below), whose sum is σ = 187971840. Its totient is φ = 78278400.

The previous prime is 122105393. The next prime is 122105429. The reversal of 122105421 is 124501221.

122105421 is a `hidden beast` number, since 122 + 1 + 0 + 542 + 1 = 666.

It is not a de Polignac number, because 122105421 - 2⁹ = 122104909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122105394 and 122105403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122105429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80056 + ... + 81566.

It is an arithmetic number, because the mean of its divisors is an integer number (5874120).

Almost surely, 2^122105421 is an apocalyptic number.

It is an amenable number.

122105421 is a deficient number, since it is larger than the sum of its proper divisors (65866419).

122105421 is a wasteful number, since it uses less digits than its factorization.

122105421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1634 (or 1628 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 122105421 is about 11050.1321711552. The cubic root of 122105421 is about 496.1103815317.

Adding to 122105421 its reverse (124501221), we get a palindrome (246606642).

The spelling of 122105421 in words is "one hundred twenty-two million, one hundred five thousand, four hundred twenty-one".