221422606241521 has 4 divisors (see below), whose sum is σ = 221437487808000. Its totient is φ = 221407724675044.

The previous prime is 221422606241513. The next prime is 221422606241537. The reversal of 221422606241521 is 125142606224122.

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 221422606241521 - 2³ = 221422606241513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221422606241591) 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, 7440760921 + ... + 7440790678.

It is an arithmetic number, because the mean of its divisors is an integer number (55359371952000).

Almost surely, 2^{221422606241521} is an apocalyptic number.

It is an amenable number.

221422606241521 is a deficient number, since it is larger than the sum of its proper divisors (14881566479).

221422606241521 is a wasteful number, since it uses less digits than its factorization.

221422606241521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14881566478.

The product of its (nonzero) digits is 184320, while the sum is 40.

The spelling of 221422606241521 in words is "two hundred twenty-one trillion, four hundred twenty-two billion, six hundred six million, two hundred forty-one thousand, five hundred twenty-one".