20211002243 has 2 divisors, whose sum is σ = 20211002244. Its totient is φ = 20211002242.

The previous prime is 20211002191. The next prime is 20211002261. The reversal of 20211002243 is 34220011202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20211002243 - 2¹⁴ = 20210985859 is a prime.

It is a super-2 number, since 2×20211002243² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20211002743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105501121 + 10105501122.

It is an arithmetic number, because the mean of its divisors is an integer number (10105501122).

Almost surely, 2^20211002243 is an apocalyptic number.

20211002243 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211002243 is an equidigital number, since it uses as much as digits as its factorization.

20211002243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20211002243 its reverse (34220011202), we get a palindrome (54431013445).

The spelling of 20211002243 in words is "twenty billion, two hundred eleven million, two thousand, two hundred forty-three".