1431221212 has 12 divisors (see below), whose sum is σ = 2505486816. Its totient is φ = 715367840.

The previous prime is 1431221191. The next prime is 1431221213. The reversal of 1431221212 is 2121221341.

It is a self number, because there is not a number n which added to its sum of digits gives 1431221212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1431221213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47089 + ... + 71272.

It is an arithmetic number, because the mean of its divisors is an integer number (208790568).

Almost surely, 2^1431221212 is an apocalyptic number.

It is an amenable number.

1431221212 is a deficient number, since it is larger than the sum of its proper divisors (1074265604).

1431221212 is a wasteful number, since it uses less digits than its factorization.

1431221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121388 (or 121386 counting only the distinct ones).

The product of its digits is 192, while the sum is 19.

The square root of 1431221212 is about 37831.4844012233. The cubic root of 1431221212 is about 1126.9437900449.

Adding to 1431221212 its reverse (2121221341), we get a palindrome (3552442553).

The spelling of 1431221212 in words is "one billion, four hundred thirty-one million, two hundred twenty-one thousand, two hundred twelve".