122222121100121 has 4 divisors (see below), whose sum is σ = 139682424114432. Its totient is φ = 104761818085812.

The previous prime is 122222121100111. The next prime is 122222121100133. The reversal of 122222121100121 is 121001121222221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 122222121100121 - 2¹⁴ = 122222121083737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122222121100093 and 122222121100102.

It is not an unprimeable number, because it can be changed into a prime (122222121100111) 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, 8730151507145 + ... + 8730151507158.

It is an arithmetic number, because the mean of its divisors is an integer number (34920606028608).

Almost surely, 2^{122222121100121} is an apocalyptic number.

It is an amenable number.

122222121100121 is a deficient number, since it is larger than the sum of its proper divisors (17460303014311).

122222121100121 is an equidigital number, since it uses as much as digits as its factorization.

122222121100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17460303014310.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 122222121100121 its reverse (121001121222221), we get a palindrome (243223242322342).

The spelling of 122222121100121 in words is "one hundred twenty-two trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred thousand, one hundred twenty-one".