42121101103 has 2 divisors, whose sum is σ = 42121101104. Its totient is φ = 42121101102.

The previous prime is 42121101041. The next prime is 42121101109. The reversal of 42121101103 is 30110112124.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42121101103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42121101109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21060550551 + 21060550552.

It is an arithmetic number, because the mean of its divisors is an integer number (21060550552).

Almost surely, 2^42121101103 is an apocalyptic number.

42121101103 is a deficient number, since it is larger than the sum of its proper divisors (1).

42121101103 is an equidigital number, since it uses as much as digits as its factorization.

42121101103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 42121101103 its reverse (30110112124), we get a palindrome (72231213227).

The spelling of 42121101103 in words is "forty-two billion, one hundred twenty-one million, one hundred one thousand, one hundred three".