12010212111221 has 4 divisors (see below), whose sum is σ = 12010221946944. Its totient is φ = 12010202275500.

The previous prime is 12010212111197. The next prime is 12010212111259. The reversal of 12010212111221 is 12211121201021.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12010212111221 - 2²⁶ = 12010145002357 is a prime.

It is a super-2 number, since 2×12010212111221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12010212111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12010212117221) 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, 2775005 + ... + 5632146.

It is an arithmetic number, because the mean of its divisors is an integer number (3002555486736).

Almost surely, 2^{12010212111221} is an apocalyptic number.

It is an amenable number.

12010212111221 is a deficient number, since it is larger than the sum of its proper divisors (9835723).

12010212111221 is an equidigital number, since it uses as much as digits as its factorization.

12010212111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9835722.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12010212111221 its reverse (12211121201021), we get a palindrome (24221333312242).

The spelling of 12010212111221 in words is "twelve trillion, ten billion, two hundred twelve million, one hundred eleven thousand, two hundred twenty-one".