121220122010221 has 16 divisors (see below), whose sum is σ = 135088986735360. Its totient is φ = 108002874248640.

The previous prime is 121220122010219. The next prime is 121220122010321. The reversal of 121220122010221 is 122010221022121.

It is a cyclic number.

It is not a de Polignac number, because 121220122010221 - 2¹ = 121220122010219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220122010201) 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, 49635685 + ... + 52020586.

It is an arithmetic number, because the mean of its divisors is an integer number (8443061670960).

Almost surely, 2^{121220122010221} is an apocalyptic number.

It is an amenable number.

121220122010221 is a deficient number, since it is larger than the sum of its proper divisors (13868864725139).

121220122010221 is a wasteful number, since it uses less digits than its factorization.

121220122010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101659476.

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

Adding to 121220122010221 its reverse (122010221022121), we get a palindrome (243230343032342).

The spelling of 121220122010221 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred twenty-two million, ten thousand, two hundred twenty-one".