12101210021221 has 8 divisors (see below), whose sum is σ = 12361519296000. Its totient is φ = 11841018943248.

The previous prime is 12101210021177. The next prime is 12101210021261. The reversal of 12101210021221 is 12212001210121.

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 12101210021221 - 2¹⁷ = 12101209890149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12101210021195 and 12101210021204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101210021261) 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, 29342221 + ... + 29751778.

It is an arithmetic number, because the mean of its divisors is an integer number (1545189912000).

Almost surely, 2^{12101210021221} is an apocalyptic number.

It is an amenable number.

12101210021221 is a deficient number, since it is larger than the sum of its proper divisors (260309274779).

12101210021221 is an equidigital number, since it uses as much as digits as its factorization.

12101210021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59098403.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12101210021221 its reverse (12212001210121), we get a palindrome (24313211231342).

The spelling of 12101210021221 in words is "twelve trillion, one hundred one billion, two hundred ten million, twenty-one thousand, two hundred twenty-one".