42021102913 has 2 divisors, whose sum is σ = 42021102914. Its totient is φ = 42021102912.

The previous prime is 42021102901. The next prime is 42021103021. The reversal of 42021102913 is 31920112024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39223010304 + 2798092609 = 198048^2 + 52897^2 .

It is a cyclic number.

It is not a de Polignac number, because 42021102913 - 2¹³ = 42021094721 is a prime.

It is not a weakly prime, because it can be changed into another prime (42021102413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21010551456 + 21010551457.

It is an arithmetic number, because the mean of its divisors is an integer number (21010551457).

Almost surely, 2^42021102913 is an apocalyptic number.

It is an amenable number.

42021102913 is a deficient number, since it is larger than the sum of its proper divisors (1).

42021102913 is an equidigital number, since it uses as much as digits as its factorization.

42021102913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 42021102913 its reverse (31920112024), we get a palindrome (73941214937).

The spelling of 42021102913 in words is "forty-two billion, twenty-one million, one hundred two thousand, nine hundred thirteen".