2120023321457 has 2 divisors, whose sum is σ = 2120023321458. Its totient is φ = 2120023321456.

The previous prime is 2120023321421. The next prime is 2120023321567. The reversal of 2120023321457 is 7541233200212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2089134907456 + 30888414001 = 1445384^2 + 175751^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120023321457 - 2¹⁰ = 2120023320433 is a prime.

It is not a weakly prime, because it can be changed into another prime (2120023326457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060011660728 + 1060011660729.

It is an arithmetic number, because the mean of its divisors is an integer number (1060011660729).

Almost surely, 2^{2120023321457} is an apocalyptic number.

It is an amenable number.

2120023321457 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120023321457 is an equidigital number, since it uses as much as digits as its factorization.

2120023321457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 32.

Adding to 2120023321457 its reverse (7541233200212), we get a palindrome (9661256521669).

The spelling of 2120023321457 in words is "two trillion, one hundred twenty billion, twenty-three million, three hundred twenty-one thousand, four hundred fifty-seven".