42121330403 has 4 divisors (see below), whose sum is σ = 42121784760. Its totient is φ = 42120876048.

The previous prime is 42121330397. The next prime is 42121330409. The reversal of 42121330403 is 30403312124.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (42121330397) and next prime (42121330409).

It is a cyclic number.

It is not a de Polignac number, because 42121330403 - 2¹⁴ = 42121314019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42121330409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32525 + ... + 292062.

It is an arithmetic number, because the mean of its divisors is an integer number (10530446190).

Almost surely, 2^42121330403 is an apocalyptic number.

42121330403 is a deficient number, since it is larger than the sum of its proper divisors (454357).

42121330403 is a wasteful number, since it uses less digits than its factorization.

42121330403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454356.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 42121330403 its reverse (30403312124), we get a palindrome (72524642527).

The spelling of 42121330403 in words is "forty-two billion, one hundred twenty-one million, three hundred thirty thousand, four hundred three".