42225304214021 has 4 divisors (see below), whose sum is σ = 42225325428012. Its totient is φ = 42225283000032.

The previous prime is 42225304213951. The next prime is 42225304214039. The reversal of 42225304214021 is 12041240352224.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17068920417025 + 25156383796996 = 4131455^2 + 5015614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42225304214021 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 (42225304213021) 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, 7271750 + ... + 11718743.

It is an arithmetic number, because the mean of its divisors is an integer number (10556331357003).

Almost surely, 2^{42225304214021} is an apocalyptic number.

It is an amenable number.

42225304214021 is a deficient number, since it is larger than the sum of its proper divisors (21213991).

42225304214021 is a wasteful number, since it uses less digits than its factorization.

42225304214021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21213990.

The product of its (nonzero) digits is 30720, while the sum is 32.

Adding to 42225304214021 its reverse (12041240352224), we get a palindrome (54266544566245).

The spelling of 42225304214021 in words is "forty-two trillion, two hundred twenty-five billion, three hundred four million, two hundred fourteen thousand, twenty-one".