420195021139 has 2 divisors, whose sum is σ = 420195021140. Its totient is φ = 420195021138.

The previous prime is 420195021121. The next prime is 420195021161. The reversal of 420195021139 is 931120591024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420195021139 - 2¹⁵ = 420194988371 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420195021098 and 420195021107.

It is not a weakly prime, because it can be changed into another prime (420195021199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210097510569 + 210097510570.

It is an arithmetic number, because the mean of its divisors is an integer number (210097510570).

Almost surely, 2^420195021139 is an apocalyptic number.

420195021139 is a deficient number, since it is larger than the sum of its proper divisors (1).

420195021139 is an equidigital number, since it uses as much as digits as its factorization.

420195021139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 37.

The spelling of 420195021139 in words is "four hundred twenty billion, one hundred ninety-five million, twenty-one thousand, one hundred thirty-nine".