42041221243 has 48 divisors (see below), whose sum is σ = 50598839808. Its totient is φ = 34810776000.

The previous prime is 42041221219. The next prime is 42041221249. The reversal of 42041221243 is 34212214024.

42041221243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42041221243 - 2²⁹ = 41504350331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42041221249) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 99860173 + ... + 99860593.

It is an arithmetic number, because the mean of its divisors is an integer number (1054142496).

Almost surely, 2^42041221243 is an apocalyptic number.

42041221243 is a deficient number, since it is larger than the sum of its proper divisors (8557618565).

42041221243 is a wasteful number, since it uses less digits than its factorization.

42041221243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944 (or 937 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 42041221243 its reverse (34212214024), we get a palindrome (76253435267).

The spelling of 42041221243 in words is "forty-two billion, forty-one million, two hundred twenty-one thousand, two hundred forty-three".