42021140269 has 2 divisors, whose sum is σ = 42021140270. Its totient is φ = 42021140268.

The previous prime is 42021140237. The next prime is 42021140279. The reversal of 42021140269 is 96204112024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30951364900 + 11069775369 = 175930^2 + 105213^2 .

It is a cyclic number.

It is not a de Polignac number, because 42021140269 - 2⁵ = 42021140237 is a prime.

It is a super-2 number, since 2×42021140269² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42021140269.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42021140279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21010570134 + 21010570135.

It is an arithmetic number, because the mean of its divisors is an integer number (21010570135).

Almost surely, 2^42021140269 is an apocalyptic number.

It is an amenable number.

42021140269 is a deficient number, since it is larger than the sum of its proper divisors (1).

42021140269 is an equidigital number, since it uses as much as digits as its factorization.

42021140269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 42021140269 in words is "forty-two billion, twenty-one million, one hundred forty thousand, two hundred sixty-nine".