42001222209997 has 2 divisors, whose sum is σ = 42001222209998. Its totient is φ = 42001222209996.

The previous prime is 42001222209901. The next prime is 42001222210021. The reversal of 42001222209997 is 79990222210024.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34377278409796 + 7623943800201 = 5863214^2 + 2761149^2 .

It is a cyclic number.

It is not a de Polignac number, because 42001222209997 - 2¹¹ = 42001222207949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42001222209997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42001222200997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21000611104998 + 21000611104999.

It is an arithmetic number, because the mean of its divisors is an integer number (21000611104999).

Almost surely, 2^{42001222209997} is an apocalyptic number.

It is an amenable number.

42001222209997 is a deficient number, since it is larger than the sum of its proper divisors (1).

42001222209997 is an equidigital number, since it uses as much as digits as its factorization.

42001222209997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 42001222209997 in words is "forty-two trillion, one billion, two hundred twenty-two million, two hundred nine thousand, nine hundred ninety-seven".