22455141221 has 4 divisors (see below), whose sum is σ = 22455906732. Its totient is φ = 22454375712.

The previous prime is 22455141193. The next prime is 22455141227. The reversal of 22455141221 is 12214155422.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9111657025 + 13343484196 = 95455^2 + 115514^2 .

It is a cyclic number.

It is not a de Polignac number, because 22455141221 - 2¹⁴ = 22455124837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22455141227) 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, 336926 + ... + 398031.

It is an arithmetic number, because the mean of its divisors is an integer number (5613976683).

Almost surely, 2^22455141221 is an apocalyptic number.

It is an amenable number.

22455141221 is a deficient number, since it is larger than the sum of its proper divisors (765511).

22455141221 is an equidigital number, since it uses as much as digits as its factorization.

22455141221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765510.

The product of its digits is 6400, while the sum is 29.

Adding to 22455141221 its reverse (12214155422), we get a palindrome (34669296643).

The spelling of 22455141221 in words is "twenty-two billion, four hundred fifty-five million, one hundred forty-one thousand, two hundred twenty-one".