121022010221 has 4 divisors (see below), whose sum is σ = 138310868832. Its totient is φ = 103733151612.

The previous prime is 121022010211. The next prime is 121022010229. The reversal of 121022010221 is 122010220121.

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, and also an emirpimes, since its reverse is a distinct semiprime: 122010220121 = 15107 ⋅8076403.

It is a cyclic number.

It is not a de Polignac number, because 121022010221 - 2⁶ = 121022010157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121022010196 and 121022010205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121022010229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8644429295 + ... + 8644429308.

It is an arithmetic number, because the mean of its divisors is an integer number (34577717208).

Almost surely, 2^121022010221 is an apocalyptic number.

It is an amenable number.

121022010221 is a deficient number, since it is larger than the sum of its proper divisors (17288858611).

121022010221 is an equidigital number, since it uses as much as digits as its factorization.

121022010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17288858610.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121022010221 its reverse (122010220121), we get a palindrome (243032230342).

The spelling of 121022010221 in words is "one hundred twenty-one billion, twenty-two million, ten thousand, two hundred twenty-one".