42242201381 has 2 divisors, whose sum is σ = 42242201382. Its totient is φ = 42242201380.

The previous prime is 42242201377. The next prime is 42242201437. The reversal of 42242201381 is 18310224224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26843873281 + 15398328100 = 163841^2 + 124090^2 .

It is a cyclic number.

It is not a de Polignac number, because 42242201381 - 2² = 42242201377 is a prime.

It is a super-2 number, since 2×42242201381² (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 (42242201081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21121100690 + 21121100691.

It is an arithmetic number, because the mean of its divisors is an integer number (21121100691).

Almost surely, 2^42242201381 is an apocalyptic number.

It is an amenable number.

42242201381 is a deficient number, since it is larger than the sum of its proper divisors (1).

42242201381 is an equidigital number, since it uses as much as digits as its factorization.

42242201381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6144, while the sum is 29.

The spelling of 42242201381 in words is "forty-two billion, two hundred forty-two million, two hundred one thousand, three hundred eighty-one".