122121012221 has 32 divisors (see below), whose sum is σ = 141897541632. Its totient is φ = 104172583680.

The previous prime is 122121012191. The next prime is 122121012229. The reversal of 122121012221 is 122210121221.

It is a cyclic number.

It is not a de Polignac number, because 122121012221 - 2¹⁸ = 122120750077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 122121012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122121012229) 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, 5671151 + ... + 5692643.

It is an arithmetic number, because the mean of its divisors is an integer number (4434298176).

Almost surely, 2^122121012221 is an apocalyptic number.

It is an amenable number.

122121012221 is a deficient number, since it is larger than the sum of its proper divisors (19776529411).

122121012221 is a wasteful number, since it uses less digits than its factorization.

122121012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22173.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 122121012221 its reverse (122210121221), we get a palindrome (244331133442).

The spelling of 122121012221 in words is "one hundred twenty-two billion, one hundred twenty-one million, twelve thousand, two hundred twenty-one".