1221131314 has 16 divisors (see below), whose sum is σ = 1978912152. Its totient is φ = 561794688.

The previous prime is 1221131189. The next prime is 1221131321. The reversal of 1221131314 is 4131311221.

It can be written as a sum of positive squares in 4 ways, for example, as 716365225 + 504766089 = 26765^2 + 22467^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1221131291 and 1221131300.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66889 + ... + 83164.

Almost surely, 2^1221131314 is an apocalyptic number.

1221131314 is a deficient number, since it is larger than the sum of its proper divisors (757780838).

1221131314 is a wasteful number, since it uses less digits than its factorization.

1221131314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150381.

The product of its digits is 144, while the sum is 19.

The square root of 1221131314 is about 34944.6893533195. The cubic root of 1221131314 is about 1068.8599129848.

Adding to 1221131314 its reverse (4131311221), we get a palindrome (5352442535).

The spelling of 1221131314 in words is "one billion, two hundred twenty-one million, one hundred thirty-one thousand, three hundred fourteen".