10565879221 has 2 divisors, whose sum is σ = 10565879222. Its totient is φ = 10565879220.

The previous prime is 10565879201. The next prime is 10565879239. The reversal of 10565879221 is 12297856501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9241938225 + 1323940996 = 96135^2 + 36386^2 .

It is a cyclic number.

It is not a de Polignac number, because 10565879221 - 2⁵ = 10565879189 is a prime.

It is a super-2 number, since 2×10565879221² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10565879201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5282939610 + 5282939611.

It is an arithmetic number, because the mean of its divisors is an integer number (5282939611).

Almost surely, 2^10565879221 is an apocalyptic number.

It is an amenable number.

10565879221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10565879221 is an equidigital number, since it uses as much as digits as its factorization.

10565879221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 302400, while the sum is 46.

The spelling of 10565879221 in words is "ten billion, five hundred sixty-five million, eight hundred seventy-nine thousand, two hundred twenty-one".