42203431221 has 16 divisors (see below), whose sum is σ = 65878528128. Its totient is φ = 23528044800.

The previous prime is 42203431211. The next prime is 42203431247. The reversal of 42203431221 is 12213430224.

It is a happy number.

It is not a de Polignac number, because 42203431221 - 2⁶ = 42203431157 is a prime.

It is a super-2 number, since 2×42203431221² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42203431191 and 42203431200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42203431211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24507520 + ... + 24509241.

It is an arithmetic number, because the mean of its divisors is an integer number (4117408008).

Almost surely, 2^42203431221 is an apocalyptic number.

42203431221 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

42203431221 is a deficient number, since it is larger than the sum of its proper divisors (23675096907).

42203431221 is a wasteful number, since it uses less digits than its factorization.

42203431221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49016812.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 42203431221 its reverse (12213430224), we get a palindrome (54416861445).

The spelling of 42203431221 in words is "forty-two billion, two hundred three million, four hundred thirty-one thousand, two hundred twenty-one".