22021012004 has 6 divisors (see below), whose sum is σ = 38536771014. Its totient is φ = 11010506000.

The previous prime is 22021011983. The next prime is 22021012049. The reversal of 22021012004 is 40021012022.

It can be written as a sum of positive squares in only one way, i.e., 21564335104 + 456676900 = 146848^2 + 21370^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22021012004.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2752626497 + ... + 2752626504.

It is an arithmetic number, because the mean of its divisors is an integer number (6422795169).

Almost surely, 2^22021012004 is an apocalyptic number.

It is an amenable number.

22021012004 is a deficient number, since it is larger than the sum of its proper divisors (16515759010).

22021012004 is a wasteful number, since it uses less digits than its factorization.

22021012004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5505253005 (or 5505253003 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 22021012004 its reverse (40021012022), we get a palindrome (62042024026).

The spelling of 22021012004 in words is "twenty-two billion, twenty-one million, twelve thousand, four".