1356442624221 has 4 divisors (see below), whose sum is σ = 1808590165632. Its totient is φ = 904295082812.

The previous prime is 1356442624189. The next prime is 1356442624253. The reversal of 1356442624221 is 1224262446531.

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 an interprime number because it is at equal distance from previous prime (1356442624189) and next prime (1356442624253).

It is a cyclic number.

It is not a de Polignac number, because 1356442624221 - 2⁵ = 1356442624189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356442625221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226073770701 + ... + 226073770706.

It is an arithmetic number, because the mean of its divisors is an integer number (452147541408).

Almost surely, 2^{1356442624221} is an apocalyptic number.

It is an amenable number.

1356442624221 is a deficient number, since it is larger than the sum of its proper divisors (452147541411).

1356442624221 is an equidigital number, since it uses as much as digits as its factorization.

1356442624221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452147541410.

The product of its digits is 552960, while the sum is 42.

The spelling of 1356442624221 in words is "one trillion, three hundred fifty-six billion, four hundred forty-two million, six hundred twenty-four thousand, two hundred twenty-one".