42139802801 has 2 divisors, whose sum is σ = 42139802802. Its totient is φ = 42139802800.

The previous prime is 42139802753. The next prime is 42139802813. The reversal of 42139802801 is 10820893124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29868480625 + 12271322176 = 172825^2 + 110776^2 .

It is a cyclic number.

It is not a de Polignac number, because 42139802801 - 2¹⁴ = 42139786417 is a prime.

It is not a weakly prime, because it can be changed into another prime (42139802891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21069901400 + 21069901401.

It is an arithmetic number, because the mean of its divisors is an integer number (21069901401).

Almost surely, 2^42139802801 is an apocalyptic number.

It is an amenable number.

42139802801 is a deficient number, since it is larger than the sum of its proper divisors (1).

42139802801 is an equidigital number, since it uses as much as digits as its factorization.

42139802801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 38.

The spelling of 42139802801 in words is "forty-two billion, one hundred thirty-nine million, eight hundred two thousand, eight hundred one".