42121231039 has 2 divisors, whose sum is σ = 42121231040. Its totient is φ = 42121231038.

The previous prime is 42121231001. The next prime is 42121231093. The reversal of 42121231039 is 93013212124.

It is a happy number.

Together with next prime (42121231093) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42121231039 - 2³⁵ = 7761492671 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42121230998 and 42121231016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42121241039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21060615519 + 21060615520.

It is an arithmetic number, because the mean of its divisors is an integer number (21060615520).

Almost surely, 2^42121231039 is an apocalyptic number.

42121231039 is a deficient number, since it is larger than the sum of its proper divisors (1).

42121231039 is an equidigital number, since it uses as much as digits as its factorization.

42121231039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 42121231039 in words is "forty-two billion, one hundred twenty-one million, two hundred thirty-one thousand, thirty-nine".