21221044893337 has 2 divisors, whose sum is σ = 21221044893338. Its totient is φ = 21221044893336.

The previous prime is 21221044893317. The next prime is 21221044893371. The reversal of 21221044893337 is 73339844012212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19888246221376 + 1332798671961 = 4459624^2 + 1154469^2 .

It is a cyclic number.

It is not a de Polignac number, because 21221044893337 - 2³⁹ = 20671289079449 is a prime.

It is not a weakly prime, because it can be changed into another prime (21221044893317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610522446668 + 10610522446669.

It is an arithmetic number, because the mean of its divisors is an integer number (10610522446669).

Almost surely, 2^{21221044893337} is an apocalyptic number.

It is an amenable number.

21221044893337 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221044893337 is an equidigital number, since it uses as much as digits as its factorization.

21221044893337 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1741824, while the sum is 49.

The spelling of 21221044893337 in words is "twenty-one trillion, two hundred twenty-one billion, forty-four million, eight hundred ninety-three thousand, three hundred thirty-seven".