42110104102021 has 2 divisors, whose sum is σ = 42110104102022. Its totient is φ = 42110104102020.

The previous prime is 42110104102007. The next prime is 42110104102061. The reversal of 42110104102021 is 12020140101124.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26255683440900 + 15854420661121 = 5124030^2 + 3981761^2 .

It is a cyclic number.

It is not a de Polignac number, because 42110104102021 - 2¹³ = 42110104093829 is a prime.

It is a super-3 number, since 3×42110104102021³ (a number of 42 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42110104102021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42110104102061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21055052051010 + 21055052051011.

It is an arithmetic number, because the mean of its divisors is an integer number (21055052051011).

Almost surely, 2^{42110104102021} is an apocalyptic number.

It is an amenable number.

42110104102021 is a deficient number, since it is larger than the sum of its proper divisors (1).

42110104102021 is an equidigital number, since it uses as much as digits as its factorization.

42110104102021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 42110104102021 its reverse (12020140101124), we get a palindrome (54130244203145).

The spelling of 42110104102021 in words is "forty-two trillion, one hundred ten billion, one hundred four million, one hundred two thousand, twenty-one".