602131221 has 12 divisors (see below), whose sum is σ = 871460460. Its totient is φ = 400629120.

The previous prime is 602131217. The next prime is 602131249. The reversal of 602131221 is 122131206.

It can be written as a sum of positive squares in 2 ways, for example, as 295496100 + 306635121 = 17190^2 + 17511^2 .

It is not a de Polignac number, because 602131221 - 2² = 602131217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 602131194 and 602131203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (602131121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61140 + ... + 70301.

It is an arithmetic number, because the mean of its divisors is an integer number (72621705).

Almost surely, 2^602131221 is an apocalyptic number.

It is an amenable number.

602131221 is a deficient number, since it is larger than the sum of its proper divisors (269329239).

602131221 is a wasteful number, since it uses less digits than its factorization.

602131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131956 (or 131953 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 602131221 is about 24538.3622314123. The cubic root of 602131221 is about 844.4301193508.

Adding to 602131221 its reverse (122131206), we get a palindrome (724262427).

The spelling of 602131221 in words is "six hundred two million, one hundred thirty-one thousand, two hundred twenty-one".