12101020112221 has 16 divisors (see below), whose sum is σ = 13041315422208. Its totient is φ = 11195630146800.

The previous prime is 12101020112147. The next prime is 12101020112243. The reversal of 12101020112221 is 12221102010121.

It is a cyclic number.

It is not a de Polignac number, because 12101020112221 - 2¹¹ = 12101020110173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12101020112195 and 12101020112204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101026112221) 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, 3090225 + ... + 5809606.

It is an arithmetic number, because the mean of its divisors is an integer number (815082213888).

Almost surely, 2^{12101020112221} is an apocalyptic number.

It is an amenable number.

12101020112221 is a deficient number, since it is larger than the sum of its proper divisors (940295309987).

12101020112221 is a wasteful number, since it uses less digits than its factorization.

12101020112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8901792.

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

Adding to 12101020112221 its reverse (12221102010121), we get a palindrome (24322122122342).

The spelling of 12101020112221 in words is "twelve trillion, one hundred one billion, twenty million, one hundred twelve thousand, two hundred twenty-one".