21146114057 has 2 divisors, whose sum is σ = 21146114058. Its totient is φ = 21146114056.

The previous prime is 21146114053. The next prime is 21146114069. The reversal of 21146114057 is 75041164112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19831398976 + 1314715081 = 140824^2 + 36259^2 .

It is a cyclic number.

It is not a de Polignac number, because 21146114057 - 2² = 21146114053 is a prime.

It is not a weakly prime, because it can be changed into another prime (21146114053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10573057028 + 10573057029.

It is an arithmetic number, because the mean of its divisors is an integer number (10573057029).

Almost surely, 2^21146114057 is an apocalyptic number.

It is an amenable number.

21146114057 is a deficient number, since it is larger than the sum of its proper divisors (1).

21146114057 is an equidigital number, since it uses as much as digits as its factorization.

21146114057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 32.

Adding to 21146114057 its reverse (75041164112), we get a palindrome (96187278169).

The spelling of 21146114057 in words is "twenty-one billion, one hundred forty-six million, one hundred fourteen thousand, fifty-seven".