22001231144 has 16 divisors (see below), whose sum is σ = 41817409620. Its totient is φ = 10849921920.

The previous prime is 22001231117. The next prime is 22001231159. The reversal of 22001231144 is 44113210022.

It can be written as a sum of positive squares in 2 ways, for example, as 21679028644 + 322202500 = 147238^2 + 17950^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18836087 + ... + 18837254.

Almost surely, 2^22001231144 is an apocalyptic number.

It is an amenable number.

22001231144 is a deficient number, since it is larger than the sum of its proper divisors (19816178476).

22001231144 is a wasteful number, since it uses less digits than its factorization.

22001231144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37673420 (or 37673416 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 22001231144 its reverse (44113210022), we get a palindrome (66114441166).

The spelling of 22001231144 in words is "twenty-two billion, one million, two hundred thirty-one thousand, one hundred forty-four".