1012231221 has 16 divisors (see below), whose sum is σ = 1439323200. Its totient is φ = 630551808.

The previous prime is 1012231183. The next prime is 1012231261. The reversal of 1012231221 is 1221322101.

It is not a de Polignac number, because 1012231221 - 2⁷ = 1012231093 is a prime.

It is a super-2 number, since 2×1012231221² = 2049224089534301682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1012231221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012231261) 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, 64306 + ... + 78483.

It is an arithmetic number, because the mean of its divisors is an integer number (89957700).

Almost surely, 2^1012231221 is an apocalyptic number.

It is an amenable number.

1012231221 is a deficient number, since it is larger than the sum of its proper divisors (427091979).

1012231221 is a wasteful number, since it uses less digits than its factorization.

1012231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142948.

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

The square root of 1012231221 is about 31815.5814185440. The cubic root of 1012231221 is about 1004.0605631763.

Adding to 1012231221 its reverse (1221322101), we get a palindrome (2233553322).

It can be divided in two parts, 101 and 2231221, that added together give a palindrome (2231322).

The spelling of 1012231221 in words is "one billion, twelve million, two hundred thirty-one thousand, two hundred twenty-one".