21134301431273 has 2 divisors, whose sum is σ = 21134301431274. Its totient is φ = 21134301431272.

The previous prime is 21134301431267. The next prime is 21134301431293. The reversal of 21134301431273 is 37213410343112.

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., 17663502623209 + 3470798808064 = 4202797^2 + 1863008^2 .

It is a cyclic number.

It is not a de Polignac number, because 21134301431273 - 2²⁴ = 21134284654057 is a prime.

It is not a weakly prime, because it can be changed into another prime (21134301431293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10567150715636 + 10567150715637.

It is an arithmetic number, because the mean of its divisors is an integer number (10567150715637).

Almost surely, 2^{21134301431273} is an apocalyptic number.

It is an amenable number.

21134301431273 is a deficient number, since it is larger than the sum of its proper divisors (1).

21134301431273 is an equidigital number, since it uses as much as digits as its factorization.

21134301431273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 35.

Adding to 21134301431273 its reverse (37213410343112), we get a palindrome (58347711774385).

The spelling of 21134301431273 in words is "twenty-one trillion, one hundred thirty-four billion, three hundred one million, four hundred thirty-one thousand, two hundred seventy-three".