2001423332057 has 2 divisors, whose sum is σ = 2001423332058. Its totient is φ = 2001423332056.

The previous prime is 2001423331991. The next prime is 2001423332081. The reversal of 2001423332057 is 7502333241002.

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., 1994489605696 + 6933726361 = 1412264^2 + 83269^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001423332057 - 2²⁴ = 2001406554841 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001423332257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000711666028 + 1000711666029.

It is an arithmetic number, because the mean of its divisors is an integer number (1000711666029).

Almost surely, 2^{2001423332057} is an apocalyptic number.

It is an amenable number.

2001423332057 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001423332057 is an equidigital number, since it uses as much as digits as its factorization.

2001423332057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 32.

Adding to 2001423332057 its reverse (7502333241002), we get a palindrome (9503756573059).

The spelling of 2001423332057 in words is "two trillion, one billion, four hundred twenty-three million, three hundred thirty-two thousand, fifty-seven".