12101121221 has 8 divisors (see below), whose sum is σ = 13830984384. Its totient is φ = 10371540960.

The previous prime is 12101121211. The next prime is 12101121239. The reversal of 12101121221 is 12212110121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12101121221 - 2¹⁴ = 12101104837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12101121196 and 12101121205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101121211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30626 + ... + 158556.

It is an arithmetic number, because the mean of its divisors is an integer number (1728873048).

Almost surely, 2^12101121221 is an apocalyptic number.

It is an amenable number.

12101121221 is a deficient number, since it is larger than the sum of its proper divisors (1729863163).

12101121221 is a wasteful number, since it uses less digits than its factorization.

12101121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141451.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12101121221 its reverse (12212110121), we get a palindrome (24313231342).

The spelling of 12101121221 in words is "twelve billion, one hundred one million, one hundred twenty-one thousand, two hundred twenty-one".