10221157205 has 12 divisors (see below), whose sum is σ = 14267901420. Its totient is φ = 7008793344.

The previous prime is 10221157189. The next prime is 10221157229. The reversal of 10221157205 is 50275112201.

It can be written as a sum of positive squares in 2 ways, for example, as 7880823076 + 2340334129 = 88774^2 + 48377^2 .

It is not a de Polignac number, because 10221157205 - 2⁴ = 10221157189 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20859260 + ... + 20859749.

It is an arithmetic number, because the mean of its divisors is an integer number (1188991785).

Almost surely, 2^10221157205 is an apocalyptic number.

It is an amenable number.

10221157205 is a deficient number, since it is larger than the sum of its proper divisors (4046744215).

10221157205 is an equidigital number, since it uses as much as digits as its factorization.

10221157205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41719028 (or 41719021 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 26.

Adding to 10221157205 its reverse (50275112201), we get a palindrome (60496269406).

The spelling of 10221157205 in words is "ten billion, two hundred twenty-one million, one hundred fifty-seven thousand, two hundred five".