42021139213 has 2 divisors, whose sum is σ = 42021139214. Its totient is φ = 42021139212.

The previous prime is 42021139163. The next prime is 42021139217. The reversal of 42021139213 is 31293112024.

It is a happy number.

42021139213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39600204004 + 2420935209 = 198998^2 + 49203^2 .

It is a cyclic number.

It is not a de Polignac number, because 42021139213 - 2²⁵ = 41987584781 is a prime.

It is a super-2 number, since 2×42021139213² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42021139217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21010569606 + 21010569607.

It is an arithmetic number, because the mean of its divisors is an integer number (21010569607).

Almost surely, 2^42021139213 is an apocalyptic number.

It is an amenable number.

42021139213 is a deficient number, since it is larger than the sum of its proper divisors (1).

42021139213 is an equidigital number, since it uses as much as digits as its factorization.

42021139213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 42021139213 in words is "forty-two billion, twenty-one million, one hundred thirty-nine thousand, two hundred thirteen".