1013212221 has 16 divisors (see below), whose sum is σ = 1625203200. Its totient is φ = 548505648.

The previous prime is 1013212199. The next prime is 1013212231. The reversal of 1013212221 is 1222123101.

1013212221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1013212221 - 2¹⁴ = 1013195837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1013212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1013212231) 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, 1269291 + ... + 1270088.

It is an arithmetic number, because the mean of its divisors is an integer number (101575200).

Almost surely, 2^1013212221 is an apocalyptic number.

It is an amenable number.

1013212221 is a deficient number, since it is larger than the sum of its proper divisors (611990979).

1013212221 is a wasteful number, since it uses less digits than its factorization.

1013212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2539408.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1013212221 is about 31830.9946592940. The cubic root of 1013212221 is about 1004.3848189279.

Adding to 1013212221 its reverse (1222123101), we get a palindrome (2235335322).

The spelling of 1013212221 in words is "one billion, thirteen million, two hundred twelve thousand, two hundred twenty-one".