42110200021 has 2 divisors, whose sum is σ = 42110200022. Its totient is φ = 42110200020.

The previous prime is 42110199893. The next prime is 42110200031. The reversal of 42110200021 is 12000201124.

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., 32391000625 + 9719199396 = 179975^2 + 98586^2 .

It is a cyclic number.

It is not a de Polignac number, because 42110200021 - 2⁷ = 42110199893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42110199974 and 42110200010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42110200031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21055100010 + 21055100011.

It is an arithmetic number, because the mean of its divisors is an integer number (21055100011).

Almost surely, 2^42110200021 is an apocalyptic number.

It is an amenable number.

42110200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

42110200021 is an equidigital number, since it uses as much as digits as its factorization.

42110200021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 42110200021 its reverse (12000201124), we get a palindrome (54110401145).

The spelling of 42110200021 in words is "forty-two billion, one hundred ten million, two hundred thousand, twenty-one".