2120023321421 has 2 divisors, whose sum is σ = 2120023321422. Its totient is φ = 2120023321420.

The previous prime is 2120023321363. The next prime is 2120023321457. The reversal of 2120023321421 is 1241233200212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1956067974025 + 163955347396 = 1398595^2 + 404914^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120023321421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120023327421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060011660710 + 1060011660711.

It is an arithmetic number, because the mean of its divisors is an integer number (1060011660711).

Almost surely, 2^{2120023321421} is an apocalyptic number.

It is an amenable number.

2120023321421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120023321421 is an equidigital number, since it uses as much as digits as its factorization.

2120023321421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 2120023321421 its reverse (1241233200212), we get a palindrome (3361256521633).

The spelling of 2120023321421 in words is "two trillion, one hundred twenty billion, twenty-three million, three hundred twenty-one thousand, four hundred twenty-one".