22240042821 has 12 divisors (see below), whose sum is σ = 34014183372. Its totient is φ = 13954536576.

The previous prime is 22240042817. The next prime is 22240042871. The reversal of 22240042821 is 12824004222.

It can be written as a sum of positive squares in 2 ways, for example, as 6392002500 + 15848040321 = 79950^2 + 125889^2 .

It is not a de Polignac number, because 22240042821 - 2² = 22240042817 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22240042871) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72679726 + ... + 72680031.

It is an arithmetic number, because the mean of its divisors is an integer number (2834515281).

Almost surely, 2^22240042821 is an apocalyptic number.

It is an amenable number.

22240042821 is a deficient number, since it is larger than the sum of its proper divisors (11774140551).

22240042821 is a wasteful number, since it uses less digits than its factorization.

22240042821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145359780 (or 145359777 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

The spelling of 22240042821 in words is "twenty-two billion, two hundred forty million, forty-two thousand, eight hundred twenty-one".