121222010221 has 16 divisors (see below), whose sum is σ = 130753889280. Its totient is φ = 111719885760.

The previous prime is 121222010207. The next prime is 121222010249. The reversal of 121222010221 is 122010222121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121222010221 - 2³¹ = 119074526573 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121222010195 and 121222010204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121222010281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33849651 + ... + 33853231.

It is an arithmetic number, because the mean of its divisors is an integer number (8172118080).

Almost surely, 2^121222010221 is an apocalyptic number.

It is an amenable number.

121222010221 is a deficient number, since it is larger than the sum of its proper divisors (9531879059).

121222010221 is a wasteful number, since it uses less digits than its factorization.

121222010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6996.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121222010221 its reverse (122010222121), we get a palindrome (243232232342).

The spelling of 121222010221 in words is "one hundred twenty-one billion, two hundred twenty-two million, ten thousand, two hundred twenty-one".