42121013243 has 2 divisors, whose sum is σ = 42121013244. Its totient is φ = 42121013242.

The previous prime is 42121013219. The next prime is 42121013251. The reversal of 42121013243 is 34231012124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42121013243 - 2⁸ = 42121012987 is a prime.

It is not a weakly prime, because it can be changed into another prime (42121013293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21060506621 + 21060506622.

It is an arithmetic number, because the mean of its divisors is an integer number (21060506622).

Almost surely, 2^42121013243 is an apocalyptic number.

42121013243 is a deficient number, since it is larger than the sum of its proper divisors (1).

42121013243 is an equidigital number, since it uses as much as digits as its factorization.

42121013243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 42121013243 its reverse (34231012124), we get a palindrome (76352025367).

The spelling of 42121013243 in words is "forty-two billion, one hundred twenty-one million, thirteen thousand, two hundred forty-three".