12021101221 has 8 divisors (see below), whose sum is σ = 12067930080. Its totient is φ = 11974343088.

The previous prime is 12021101219. The next prime is 12021101233. The reversal of 12021101221 is 12210112021.

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 12021101221 - 2¹ = 12021101219 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 (12021101821) 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, 336595 + ... + 370591.

It is an arithmetic number, because the mean of its divisors is an integer number (1508491260).

Almost surely, 2^12021101221 is an apocalyptic number.

It is an amenable number.

12021101221 is a deficient number, since it is larger than the sum of its proper divisors (46828859).

12021101221 is a wasteful number, since it uses less digits than its factorization.

12021101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35363.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12021101221 its reverse (12210112021), we get a palindrome (24231213242).

The spelling of 12021101221 in words is "twelve billion, twenty-one million, one hundred one thousand, two hundred twenty-one".