42210131021 has 8 divisors (see below), whose sum is σ = 42937896888. Its totient is φ = 41483520000.

The previous prime is 42210131009. The next prime is 42210131023. The reversal of 42210131021 is 12013101224.

It can be written as a sum of positive squares in 4 ways, for example, as 541074121 + 41669056900 = 23261^2 + 204130^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42210131021 - 2⁶ = 42210130957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42210131023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214820 + ... + 361341.

It is an arithmetic number, because the mean of its divisors is an integer number (5367237111).

Almost surely, 2^42210131021 is an apocalyptic number.

It is an amenable number.

42210131021 is a deficient number, since it is larger than the sum of its proper divisors (727765867).

42210131021 is a wasteful number, since it uses less digits than its factorization.

42210131021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577423.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 42210131021 its reverse (12013101224), we get a palindrome (54223232245).

The spelling of 42210131021 in words is "forty-two billion, two hundred ten million, one hundred thirty-one thousand, twenty-one".