21013022273 has 2 divisors, whose sum is σ = 21013022274. Its totient is φ = 21013022272.

The previous prime is 21013022183. The next prime is 21013022293. The reversal of 21013022273 is 37222031012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17481335089 + 3531687184 = 132217^2 + 59428^2 .

It is a cyclic number.

It is not a de Polignac number, because 21013022273 - 2¹⁴ = 21013005889 is a prime.

It is not a weakly prime, because it can be changed into another prime (21013022293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506511136 + 10506511137.

It is an arithmetic number, because the mean of its divisors is an integer number (10506511137).

Almost surely, 2^21013022273 is an apocalyptic number.

It is an amenable number.

21013022273 is a deficient number, since it is larger than the sum of its proper divisors (1).

21013022273 is an equidigital number, since it uses as much as digits as its factorization.

21013022273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 23.

Adding to 21013022273 its reverse (37222031012), we get a palindrome (58235053285).

The spelling of 21013022273 in words is "twenty-one billion, thirteen million, twenty-two thousand, two hundred seventy-three".