42121123044243 has 64 divisors (see below), whose sum is σ = 60296382996480. Its totient is φ = 26096097484800.

The previous prime is 42121123044241. The next prime is 42121123044257. The reversal of 42121123044243 is 34244032112124.

It is not a de Polignac number, because 42121123044243 - 2¹ = 42121123044241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42121123044241) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4509268753 + ... + 4509278093.

It is an arithmetic number, because the mean of its divisors is an integer number (942130984320).

Almost surely, 2^{42121123044243} is an apocalyptic number.

42121123044243 is a deficient number, since it is larger than the sum of its proper divisors (18175259952237).

42121123044243 is a wasteful number, since it uses less digits than its factorization.

42121123044243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18260.

The product of its (nonzero) digits is 36864, while the sum is 33.

Adding to 42121123044243 its reverse (34244032112124), we get a palindrome (76365155156367).

The spelling of 42121123044243 in words is "forty-two trillion, one hundred twenty-one billion, one hundred twenty-three million, forty-four thousand, two hundred forty-three".