42201124421 has 4 divisors (see below), whose sum is σ = 42202016844. Its totient is φ = 42200232000.

The previous prime is 42201124403. The next prime is 42201124439. The reversal of 42201124421 is 12442110224.

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

It is an interprime number because it is at equal distance from previous prime (42201124403) and next prime (42201124439).

It can be written as a sum of positive squares in 2 ways, for example, as 4940543521 + 37260580900 = 70289^2 + 193030^2 .

It is a cyclic number.

It is not a de Polignac number, because 42201124421 - 2²² = 42196930117 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 (42201121421) 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, 371060 + ... + 471261.

It is an arithmetic number, because the mean of its divisors is an integer number (10550504211).

Almost surely, 2^42201124421 is an apocalyptic number.

It is an amenable number.

42201124421 is a deficient number, since it is larger than the sum of its proper divisors (892423).

42201124421 is an equidigital number, since it uses as much as digits as its factorization.

42201124421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892422.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 42201124421 its reverse (12442110224), we get a palindrome (54643234645).

The spelling of 42201124421 in words is "forty-two billion, two hundred one million, one hundred twenty-four thousand, four hundred twenty-one".