42121101431 has 2 divisors, whose sum is σ = 42121101432. Its totient is φ = 42121101430.

The previous prime is 42121101413. The next prime is 42121101437. The reversal of 42121101431 is 13410112124.

42121101431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (42121101413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42121101431 - 2¹⁰ = 42121100407 is a prime.

It is a super-2 number, since 2×42121101431² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42121101437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21060550715 + 21060550716.

It is an arithmetic number, because the mean of its divisors is an integer number (21060550716).

Almost surely, 2^42121101431 is an apocalyptic number.

42121101431 is a deficient number, since it is larger than the sum of its proper divisors (1).

42121101431 is an equidigital number, since it uses as much as digits as its factorization.

42121101431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 42121101431 its reverse (13410112124), we get a palindrome (55531213555).

The spelling of 42121101431 in words is "forty-two billion, one hundred twenty-one million, one hundred one thousand, four hundred thirty-one".