42202251334021 has 4 divisors (see below), whose sum is σ = 42202265298732. Its totient is φ = 42202237369312.

The previous prime is 42202251334007. The next prime is 42202251334063. The reversal of 42202251334021 is 12043315220224.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 16458551203396 + 25743700130625 = 4056914^2 + 5073825^2 .

It is a cyclic number.

It is not a de Polignac number, because 42202251334021 - 2⁵ = 42202251333989 is a prime.

It is a super-2 number, since 2×42202251334021² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42202251338021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348070 + ... + 9193783.

It is an arithmetic number, because the mean of its divisors is an integer number (10550566324683).

Almost surely, 2^{42202251334021} is an apocalyptic number.

It is an amenable number.

42202251334021 is a deficient number, since it is larger than the sum of its proper divisors (13964711).

42202251334021 is an equidigital number, since it uses as much as digits as its factorization.

42202251334021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13964710.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 42202251334021 its reverse (12043315220224), we get a palindrome (54245566554245).

The spelling of 42202251334021 in words is "forty-two trillion, two hundred two billion, two hundred fifty-one million, three hundred thirty-four thousand, twenty-one".