1212444141221 has 4 divisors (see below), whose sum is σ = 1212453231744. Its totient is φ = 1212435050700.

The previous prime is 1212444141191. The next prime is 1212444141239. The reversal of 1212444141221 is 1221414442121.

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 1212444141221 - 2²² = 1212439946917 is a prime.

It is a super-2 number, since 2×1212444141221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212444143221) 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, 4342175 + ... + 4612956.

It is an arithmetic number, because the mean of its divisors is an integer number (303113307936).

Almost surely, 2^{1212444141221} is an apocalyptic number.

It is an amenable number.

1212444141221 is a deficient number, since it is larger than the sum of its proper divisors (9090523).

1212444141221 is an equidigital number, since it uses as much as digits as its factorization.

1212444141221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9090522.

The product of its digits is 4096, while the sum is 29.

Adding to 1212444141221 its reverse (1221414442121), we get a palindrome (2433858583342).

The spelling of 1212444141221 in words is "one trillion, two hundred twelve billion, four hundred forty-four million, one hundred forty-one thousand, two hundred twenty-one".