2134242220421 has 2 divisors, whose sum is σ = 2134242220422. Its totient is φ = 2134242220420.

The previous prime is 2134242220379. The next prime is 2134242220441. The reversal of 2134242220421 is 1240222424312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1095453196321 + 1038789024100 = 1046639^2 + 1019210^2 .

It is a cyclic number.

It is not a de Polignac number, because 2134242220421 - 2³⁴ = 2117062351237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2134242220441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1067121110210 + 1067121110211.

It is an arithmetic number, because the mean of its divisors is an integer number (1067121110211).

Almost surely, 2^{2134242220421} is an apocalyptic number.

It is an amenable number.

2134242220421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2134242220421 is an equidigital number, since it uses as much as digits as its factorization.

2134242220421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 2134242220421 its reverse (1240222424312), we get a palindrome (3374464644733).

The spelling of 2134242220421 in words is "two trillion, one hundred thirty-four billion, two hundred forty-two million, two hundred twenty thousand, four hundred twenty-one".