10212322221 has 12 divisors (see below), whose sum is σ = 14812343260. Its totient is φ = 6779963520.

The previous prime is 10212322193. The next prime is 10212322273. The reversal of 10212322221 is 12222321201.

It can be written as a sum of positive squares in 2 ways, for example, as 8769386025 + 1442936196 = 93645^2 + 37986^2 .

It is not a de Polignac number, because 10212322221 - 2²⁷ = 10078104493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10212322194 and 10212322203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212322121) 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, 2351986 + ... + 2356323.

Almost surely, 2^10212322221 is an apocalyptic number.

It is an amenable number.

10212322221 is a deficient number, since it is larger than the sum of its proper divisors (4600021039).

10212322221 is a wasteful number, since it uses less digits than its factorization.

10212322221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4708556 (or 4708553 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 10212322221 its reverse (12222321201), we get a palindrome (22434643422).

The spelling of 10212322221 in words is "ten billion, two hundred twelve million, three hundred twenty-two thousand, two hundred twenty-one".