21120032132057 has 2 divisors, whose sum is σ = 21120032132058. Its totient is φ = 21120032132056.

The previous prime is 21120032132033. The next prime is 21120032132123. The reversal of 21120032132057 is 75023123002112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11412937916416 + 9707094215641 = 3378304^2 + 3115621^2 .

It is a cyclic number.

It is not a de Polignac number, because 21120032132057 - 2¹⁸ = 21120031869913 is a prime.

It is not a weakly prime, because it can be changed into another prime (21120032182057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560016066028 + 10560016066029.

It is an arithmetic number, because the mean of its divisors is an integer number (10560016066029).

Almost surely, 2^{21120032132057} is an apocalyptic number.

It is an amenable number.

21120032132057 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120032132057 is an equidigital number, since it uses as much as digits as its factorization.

21120032132057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

Adding to 21120032132057 its reverse (75023123002112), we get a palindrome (96143155134169).

The spelling of 21120032132057 in words is "twenty-one trillion, one hundred twenty billion, thirty-two million, one hundred thirty-two thousand, fifty-seven".