20010012221057 has 2 divisors, whose sum is σ = 20010012221058. Its totient is φ = 20010012221056.

The previous prime is 20010012220973. The next prime is 20010012221063. The reversal of 20010012221057 is 75012221001002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15677553141121 + 4332459079936 = 3959489^2 + 2081456^2 .

It is a cyclic number.

It is not a de Polignac number, because 20010012221057 - 2⁸ = 20010012220801 is a prime.

It is not a weakly prime, because it can be changed into another prime (20010012221077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005006110528 + 10005006110529.

It is an arithmetic number, because the mean of its divisors is an integer number (10005006110529).

Almost surely, 2^{20010012221057} is an apocalyptic number.

It is an amenable number.

20010012221057 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010012221057 is an equidigital number, since it uses as much as digits as its factorization.

20010012221057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 23.

Adding to 20010012221057 its reverse (75012221001002), we get a palindrome (95022233222059).

The spelling of 20010012221057 in words is "twenty trillion, ten billion, twelve million, two hundred twenty-one thousand, fifty-seven".