21220201112057 has 2 divisors, whose sum is σ = 21220201112058. Its totient is φ = 21220201112056.

The previous prime is 21220201112039. The next prime is 21220201112129. The reversal of 21220201112057 is 75021110202212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12024138797056 + 9196062315001 = 3467584^2 + 3032501^2 .

It is a cyclic number.

It is not a de Polignac number, because 21220201112057 - 2²⁸ = 21219932676601 is a prime.

It is a super-2 number, since 2×21220201112057² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21220201112557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610100556028 + 10610100556029.

It is an arithmetic number, because the mean of its divisors is an integer number (10610100556029).

Almost surely, 2^{21220201112057} is an apocalyptic number.

It is an amenable number.

21220201112057 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220201112057 is an equidigital number, since it uses as much as digits as its factorization.

21220201112057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 26.

Adding to 21220201112057 its reverse (75021110202212), we get a palindrome (96241311314269).

The spelling of 21220201112057 in words is "twenty-one trillion, two hundred twenty billion, two hundred one million, one hundred twelve thousand, fifty-seven".