20211322357 has 2 divisors, whose sum is σ = 20211322358. Its totient is φ = 20211322356.

The previous prime is 20211322303. The next prime is 20211322363. The reversal of 20211322357 is 75322311202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19934898481 + 276423876 = 141191^2 + 16626^2 .

It is a cyclic number.

It is not a de Polignac number, because 20211322357 - 2¹⁵ = 20211289589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20211325357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105661178 + 10105661179.

It is an arithmetic number, because the mean of its divisors is an integer number (10105661179).

Almost surely, 2^20211322357 is an apocalyptic number.

It is an amenable number.

20211322357 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211322357 is an equidigital number, since it uses as much as digits as its factorization.

20211322357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 28.

Adding to 20211322357 its reverse (75322311202), we get a palindrome (95533633559).

It can be divided in two parts, 2021 and 1322357, that added together give a triangular number (1324378 = T₁₆₂₇).

The spelling of 20211322357 in words is "twenty billion, two hundred eleven million, three hundred twenty-two thousand, three hundred fifty-seven".