424122139981 has 2 divisors, whose sum is σ = 424122139982. Its totient is φ = 424122139980.

The previous prime is 424122139949. The next prime is 424122140027. The reversal of 424122139981 is 189931221424.

It is an a-pointer prime, because the next prime (424122140027) can be obtained adding 424122139981 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 416224974025 + 7897165956 = 645155^2 + 88866^2 .

It is a cyclic number.

It is not a de Polignac number, because 424122139981 - 2⁵ = 424122139949 is a prime.

It is a super-2 number, since 2×424122139981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (424122139681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212061069990 + 212061069991.

It is an arithmetic number, because the mean of its divisors is an integer number (212061069991).

Almost surely, 2^424122139981 is an apocalyptic number.

It is an amenable number.

424122139981 is a deficient number, since it is larger than the sum of its proper divisors (1).

424122139981 is an equidigital number, since it uses as much as digits as its factorization.

424122139981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 46.

The spelling of 424122139981 in words is "four hundred twenty-four billion, one hundred twenty-two million, one hundred thirty-nine thousand, nine hundred eighty-one".