338142503733421 has 2 divisors, whose sum is σ = 338142503733422. Its totient is φ = 338142503733420.

The previous prime is 338142503733401. The next prime is 338142503733451. The reversal of 338142503733421 is 124337305241833.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 312362817616521 + 25779686116900 = 17673789^2 + 5077370^2 .

It is an emirp because it is prime and its reverse (124337305241833) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 338142503733421 - 2²³ = 338142495344813 is a prime.

It is a super-2 number, since 2×338142503733421² (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 (338142503733401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169071251866710 + 169071251866711.

It is an arithmetic number, because the mean of its divisors is an integer number (169071251866711).

Almost surely, 2^{338142503733421} is an apocalyptic number.

It is an amenable number.

338142503733421 is a deficient number, since it is larger than the sum of its proper divisors (1).

338142503733421 is an equidigital number, since it uses as much as digits as its factorization.

338142503733421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4354560, while the sum is 49.

The spelling of 338142503733421 in words is "three hundred thirty-eight trillion, one hundred forty-two billion, five hundred three million, seven hundred thirty-three thousand, four hundred twenty-one".