312011144443421 has 2 divisors, whose sum is σ = 312011144443422. Its totient is φ = 312011144443420.

The previous prime is 312011144443393. The next prime is 312011144443433. The reversal of 312011144443421 is 124344441110213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207508346522500 + 104502797920921 = 14405150^2 + 10222661^2 .

It is a cyclic number.

It is not a de Polignac number, because 312011144443421 - 2⁶ = 312011144443357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312011144443451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156005572221710 + 156005572221711.

It is an arithmetic number, because the mean of its divisors is an integer number (156005572221711).

Almost surely, 2^{312011144443421} is an apocalyptic number.

It is an amenable number.

312011144443421 is a deficient number, since it is larger than the sum of its proper divisors (1).

312011144443421 is an equidigital number, since it uses as much as digits as its factorization.

312011144443421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36864, while the sum is 35.

Adding to 312011144443421 its reverse (124344441110213), we get a palindrome (436355585553634).

The spelling of 312011144443421 in words is "three hundred twelve trillion, eleven billion, one hundred forty-four million, four hundred forty-three thousand, four hundred twenty-one".