20221143261 has 16 divisors (see below), whose sum is σ = 29492732928. Its totient is φ = 12221838000.

The previous prime is 20221143247. The next prime is 20221143301. The reversal of 20221143261 is 16234112202.

It is not a de Polignac number, because 20221143261 - 2¹⁰ = 20221142237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221143161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 822715 + ... + 846936.

It is an arithmetic number, because the mean of its divisors is an integer number (1843295808).

Almost surely, 2^20221143261 is an apocalyptic number.

It is an amenable number.

20221143261 is a deficient number, since it is larger than the sum of its proper divisors (9271589667).

20221143261 is a wasteful number, since it uses less digits than its factorization.

20221143261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670032.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 20221143261 its reverse (16234112202), we get a palindrome (36455255463).

The spelling of 20221143261 in words is "twenty billion, two hundred twenty-one million, one hundred forty-three thousand, two hundred sixty-one".