122134204021 has 4 divisors (see below), whose sum is σ = 125435128492. Its totient is φ = 118833279552.

The previous prime is 122134204001. The next prime is 122134204043. The reversal of 122134204021 is 120402431221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120402431221 = 283 ⋅425450287.

It can be written as a sum of positive squares in 2 ways, for example, as 54422357796 + 67711846225 = 233286^2 + 260215^2 .

It is a cyclic number.

It is not a de Polignac number, because 122134204021 - 2¹³ = 122134195829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122134203983 and 122134204001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122134204001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1650462180 + ... + 1650462253.

It is an arithmetic number, because the mean of its divisors is an integer number (31358782123).

Almost surely, 2^122134204021 is an apocalyptic number.

It is an amenable number.

122134204021 is a deficient number, since it is larger than the sum of its proper divisors (3300924471).

122134204021 is an equidigital number, since it uses as much as digits as its factorization.

122134204021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3300924470.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 122134204021 its reverse (120402431221), we get a palindrome (242536635242).

The spelling of 122134204021 in words is "one hundred twenty-two billion, one hundred thirty-four million, two hundred four thousand, twenty-one".