21044054212 has 6 divisors (see below), whose sum is σ = 36827094878. Its totient is φ = 10522027104.

The previous prime is 21044054209. The next prime is 21044054249. The reversal of 21044054212 is 21245044012.

It can be written as a sum of positive squares in only one way, i.e., 19461924036 + 1582130176 = 139506^2 + 39776^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2630506773 + ... + 2630506780.

Almost surely, 2^21044054212 is an apocalyptic number.

It is an amenable number.

21044054212 is a deficient number, since it is larger than the sum of its proper divisors (15783040666).

21044054212 is a wasteful number, since it uses less digits than its factorization.

21044054212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5261013557 (or 5261013555 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 21044054212 its reverse (21245044012), we get a palindrome (42289098224).

The spelling of 21044054212 in words is "twenty-one billion, forty-four million, fifty-four thousand, two hundred twelve".