11020020257 has 2 divisors, whose sum is σ = 11020020258. Its totient is φ = 11020020256.

The previous prime is 11020020223. The next prime is 11020020269. The reversal of 11020020257 is 75202002011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10984926481 + 35093776 = 104809^2 + 5924^2 .

It is a cyclic number.

It is not a de Polignac number, because 11020020257 - 2⁸ = 11020020001 is a prime.

It is not a weakly prime, because it can be changed into another prime (11020020217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5510010128 + 5510010129.

It is an arithmetic number, because the mean of its divisors is an integer number (5510010129).

Almost surely, 2^11020020257 is an apocalyptic number.

It is an amenable number.

11020020257 is a deficient number, since it is larger than the sum of its proper divisors (1).

11020020257 is an equidigital number, since it uses as much as digits as its factorization.

11020020257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 20.

Adding to 11020020257 its reverse (75202002011), we get a palindrome (86222022268).

The spelling of 11020020257 in words is "eleven billion, twenty million, twenty thousand, two hundred fifty-seven".