20010101122057 has 2 divisors, whose sum is σ = 20010101122058. Its totient is φ = 20010101122056.

The previous prime is 20010101121991. The next prime is 20010101122061. The reversal of 20010101122057 is 75022110101002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19594973477641 + 415127644416 = 4426621^2 + 644304^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20010101122057 is a prime.

It is a super-2 number, since 2×20010101122057² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20010101122097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005050561028 + 10005050561029.

It is an arithmetic number, because the mean of its divisors is an integer number (10005050561029).

Almost surely, 2^{20010101122057} is an apocalyptic number.

It is an amenable number.

20010101122057 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010101122057 is an equidigital number, since it uses as much as digits as its factorization.

20010101122057 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 22.

Adding to 20010101122057 its reverse (75022110101002), we get a palindrome (95032211223059).

The spelling of 20010101122057 in words is "twenty trillion, ten billion, one hundred one million, one hundred twenty-two thousand, fifty-seven".