10213131221 has 8 divisors (see below), whose sum is σ = 10444269600. Its totient is φ = 9983927440.

The previous prime is 10213131193. The next prime is 10213131223. The reversal of 10213131221 is 12213131201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10213131221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10213131221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10213131223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 472970 + ... + 494091.

It is an arithmetic number, because the mean of its divisors is an integer number (1305533700).

Almost surely, 2^10213131221 is an apocalyptic number.

It is an amenable number.

10213131221 is a deficient number, since it is larger than the sum of its proper divisors (231138379).

10213131221 is an equidigital number, since it uses as much as digits as its factorization.

10213131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967299.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 10213131221 its reverse (12213131201), we get a palindrome (22426262422).

The spelling of 10213131221 in words is "ten billion, two hundred thirteen million, one hundred thirty-one thousand, two hundred twenty-one".