22221142541 has 4 divisors (see below), whose sum is σ = 23930461212. Its totient is φ = 20511823872.

The previous prime is 22221142511. The next prime is 22221142543. The reversal of 22221142541 is 14524112222.

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 4597518025 + 17623624516 = 67805^2 + 132754^2 .

It is a cyclic number.

It is not a de Polignac number, because 22221142541 - 2⁶ = 22221142477 is a prime.

It is a super-3 number, since 3×22221142541³ (a number of 32 digits) contains 333 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 22221142541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221142543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 854659316 + ... + 854659341.

It is an arithmetic number, because the mean of its divisors is an integer number (5982615303).

Almost surely, 2^22221142541 is an apocalyptic number.

It is an amenable number.

22221142541 is a deficient number, since it is larger than the sum of its proper divisors (1709318671).

22221142541 is a wasteful number, since it uses less digits than its factorization.

22221142541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1709318670.

The product of its digits is 2560, while the sum is 26.

Adding to 22221142541 its reverse (14524112222), we get a palindrome (36745254763).

The spelling of 22221142541 in words is "twenty-two billion, two hundred twenty-one million, one hundred forty-two thousand, five hundred forty-one".