42313133021 has 2 divisors, whose sum is σ = 42313133022. Its totient is φ = 42313133020.

The previous prime is 42313133017. The next prime is 42313133063. The reversal of 42313133021 is 12033131324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29785927396 + 12527205625 = 172586^2 + 111925^2 .

It is a cyclic number.

It is not a de Polignac number, because 42313133021 - 2² = 42313133017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42313133921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21156566510 + 21156566511.

It is an arithmetic number, because the mean of its divisors is an integer number (21156566511).

Almost surely, 2^42313133021 is an apocalyptic number.

It is an amenable number.

42313133021 is a deficient number, since it is larger than the sum of its proper divisors (1).

42313133021 is an equidigital number, since it uses as much as digits as its factorization.

42313133021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 42313133021 its reverse (12033131324), we get a palindrome (54346264345).

The spelling of 42313133021 in words is "forty-two billion, three hundred thirteen million, one hundred thirty-three thousand, twenty-one".