20112321020257 has 2 divisors, whose sum is σ = 20112321020258. Its totient is φ = 20112321020256.

The previous prime is 20112321020203. The next prime is 20112321020401. The reversal of 20112321020257 is 75202012321102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12214962090081 + 7897358930176 = 3494991^2 + 2810224^2 .

It is a cyclic number.

It is not a de Polignac number, because 20112321020257 - 2²⁷ = 20112186802529 is a prime.

It is not a weakly prime, because it can be changed into another prime (20112321021257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056160510128 + 10056160510129.

It is an arithmetic number, because the mean of its divisors is an integer number (10056160510129).

Almost surely, 2^{20112321020257} is an apocalyptic number.

It is an amenable number.

20112321020257 is a deficient number, since it is larger than the sum of its proper divisors (1).

20112321020257 is an equidigital number, since it uses as much as digits as its factorization.

20112321020257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

Adding to 20112321020257 its reverse (75202012321102), we get a palindrome (95314333341359).

The spelling of 20112321020257 in words is "twenty trillion, one hundred twelve billion, three hundred twenty-one million, twenty thousand, two hundred fifty-seven".