12221000112121 has 4 divisors (see below), whose sum is σ = 12278919544144. Its totient is φ = 12163080680100.

The previous prime is 12221000112109. The next prime is 12221000112137. The reversal of 12221000112121 is 12121100012221.

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.

It is a cyclic number.

It is not a de Polignac number, because 12221000112121 - 2³³ = 12212410177529 is a prime.

It is a super-2 number, since 2×12221000112121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12221000112095 and 12221000112104.

It is not an unprimeable number, because it can be changed into a prime (12221000119121) 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, 28959715695 + ... + 28959716116.

It is an arithmetic number, because the mean of its divisors is an integer number (3069729886036).

Almost surely, 2^{12221000112121} is an apocalyptic number.

It is an amenable number.

12221000112121 is a deficient number, since it is larger than the sum of its proper divisors (57919432023).

12221000112121 is an equidigital number, since it uses as much as digits as its factorization.

12221000112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57919432022.

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

Adding to 12221000112121 its reverse (12121100012221), we get a palindrome (24342100124342).

The spelling of 12221000112121 in words is "twelve trillion, two hundred twenty-one billion, one hundred twelve thousand, one hundred twenty-one".