134444202421 has 2 divisors, whose sum is σ = 134444202422. Its totient is φ = 134444202420.

The previous prime is 134444202397. The next prime is 134444202491. The reversal of 134444202421 is 124202444431.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73380850321 + 61063352100 = 270889^2 + 247110^2 .

It is a cyclic number.

It is not a de Polignac number, because 134444202421 - 2¹⁵ = 134444169653 is a prime.

It is a super-2 number, since 2×134444202421² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134444202491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67222101210 + 67222101211.

It is an arithmetic number, because the mean of its divisors is an integer number (67222101211).

Almost surely, 2^134444202421 is an apocalyptic number.

It is an amenable number.

134444202421 is a deficient number, since it is larger than the sum of its proper divisors (1).

134444202421 is an equidigital number, since it uses as much as digits as its factorization.

134444202421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 134444202421 its reverse (124202444431), we get a palindrome (258646646852).

The spelling of 134444202421 in words is "one hundred thirty-four billion, four hundred forty-four million, two hundred two thousand, four hundred twenty-one".