1012015221 has 16 divisors (see below), whose sum is σ = 1623283200. Its totient is φ = 547857648.

The previous prime is 1012015189. The next prime is 1012015223. The reversal of 1012015221 is 1225102101.

It is not a de Polignac number, because 1012015221 - 2⁵ = 1012015189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1012015221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012015223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1267791 + ... + 1268588.

It is an arithmetic number, because the mean of its divisors is an integer number (101455200).

Almost surely, 2^1012015221 is an apocalyptic number.

It is an amenable number.

1012015221 is a deficient number, since it is larger than the sum of its proper divisors (611267979).

1012015221 is a wasteful number, since it uses less digits than its factorization.

1012015221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2536408.

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 1012015221 is about 31812.1866742920. The cubic root of 1012015221 is about 1003.9891392745.

Adding to 1012015221 its reverse (1225102101), we get a palindrome (2237117322).

The spelling of 1012015221 in words is "one billion, twelve million, fifteen thousand, two hundred twenty-one".