1211311426 has 8 divisors (see below), whose sum is σ = 1956733884. Its totient is φ = 559066800.

The previous prime is 1211311403. The next prime is 1211311471. The reversal of 1211311426 is 6241131121.

It can be written as a sum of positive squares in 2 ways, for example, as 1001785801 + 209525625 = 31651^2 + 14475^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1211311397 and 1211311406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23294425 + ... + 23294476.

Almost surely, 2^1211311426 is an apocalyptic number.

1211311426 is a deficient number, since it is larger than the sum of its proper divisors (745422458).

1211311426 is a wasteful number, since it uses less digits than its factorization.

1211311426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46588916.

The product of its digits is 288, while the sum is 22.

The square root of 1211311426 is about 34803.8995803631. The cubic root of 1211311426 is about 1065.9870725564.

Adding to 1211311426 its reverse (6241131121), we get a palindrome (7452442547).

The spelling of 1211311426 in words is "one billion, two hundred eleven million, three hundred eleven thousand, four hundred twenty-six".