42021102349 has 2 divisors, whose sum is σ = 42021102350. Its totient is φ = 42021102348.

The previous prime is 42021102337. The next prime is 42021102413. The reversal of 42021102349 is 94320112024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29903055625 + 12118046724 = 172925^2 + 110082^2 .

It is a cyclic number.

It is not a de Polignac number, because 42021102349 - 2¹⁷ = 42020971277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42021102749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21010551174 + 21010551175.

It is an arithmetic number, because the mean of its divisors is an integer number (21010551175).

Almost surely, 2^42021102349 is an apocalyptic number.

It is an amenable number.

42021102349 is a deficient number, since it is larger than the sum of its proper divisors (1).

42021102349 is an equidigital number, since it uses as much as digits as its factorization.

42021102349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 42021102349 in words is "forty-two billion, twenty-one million, one hundred two thousand, three hundred forty-nine".