122121220221001 has 16 divisors (see below), whose sum is σ = 124760451329280. Its totient is φ = 119511427368960.

The previous prime is 122121220220977. The next prime is 122121220221053. The reversal of 122121220221001 is 100122022121221.

It is a cyclic number.

It is not a de Polignac number, because 122121220221001 - 2⁷ = 122121220220873 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122121220221001.

It is not an unprimeable number, because it can be changed into a prime (122121220221101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13146921 + ... + 20422633.

It is an arithmetic number, because the mean of its divisors is an integer number (7797528208080).

Almost surely, 2^{122121220221001} is an apocalyptic number.

It is an amenable number.

122121220221001 is a deficient number, since it is larger than the sum of its proper divisors (2639231108279).

122121220221001 is a wasteful number, since it uses less digits than its factorization.

122121220221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7277736.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 122121220221001 its reverse (100122022121221), we get a palindrome (222243242342222).

The spelling of 122121220221001 in words is "one hundred twenty-two trillion, one hundred twenty-one billion, two hundred twenty million, two hundred twenty-one thousand, one".