321012042010421 has 2 divisors, whose sum is σ = 321012042010422. Its totient is φ = 321012042010420.

The previous prime is 321012042010367. The next prime is 321012042010447. The reversal of 321012042010421 is 124010240210123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 316420557309796 + 4591484700625 = 17788214^2 + 2142775^2 .

It is a cyclic number.

It is not a de Polignac number, because 321012042010421 - 2²⁶ = 321011974901557 is a prime.

It is a super-2 number, since 2×321012042010421² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321012042015421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160506021005210 + 160506021005211.

It is an arithmetic number, because the mean of its divisors is an integer number (160506021005211).

Almost surely, 2^{321012042010421} is an apocalyptic number.

It is an amenable number.

321012042010421 is a deficient number, since it is larger than the sum of its proper divisors (1).

321012042010421 is an equidigital number, since it uses as much as digits as its factorization.

321012042010421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 321012042010421 its reverse (124010240210123), we get a palindrome (445022282220544).

The spelling of 321012042010421 in words is "three hundred twenty-one trillion, twelve billion, forty-two million, ten thousand, four hundred twenty-one".