20011112120057 has 2 divisors, whose sum is σ = 20011112120058. Its totient is φ = 20011112120056.

The previous prime is 20011112119993. The next prime is 20011112120059. The reversal of 20011112120057 is 75002121111002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14550379734016 + 5460732386041 = 3814496^2 + 2336821^2 .

It is a cyclic number.

It is not a de Polignac number, because 20011112120057 - 2⁶ = 20011112119993 is a prime.

It is a super-2 number, since 2×20011112120057² (a number of 27 digits) contains 22 as substring.

Together with 20011112120059, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20011112120059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005556060028 + 10005556060029.

It is an arithmetic number, because the mean of its divisors is an integer number (10005556060029).

Almost surely, 2^{20011112120057} is an apocalyptic number.

It is an amenable number.

20011112120057 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011112120057 is an equidigital number, since it uses as much as digits as its factorization.

20011112120057 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 23.

Adding to 20011112120057 its reverse (75002121111002), we get a palindrome (95013233231059).

The spelling of 20011112120057 in words is "twenty trillion, eleven billion, one hundred twelve million, one hundred twenty thousand, fifty-seven".