1211343445 has 32 divisors (see below), whose sum is σ = 1621960704. Its totient is φ = 862444800.

The previous prime is 1211343443. The next prime is 1211343457. The reversal of 1211343445 is 5443431121.

It is not a de Polignac number, because 1211343445 - 2¹ = 1211343443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211343443) 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 31 ways as a sum of consecutive naturals, for example, 625699 + ... + 627631.

It is an arithmetic number, because the mean of its divisors is an integer number (50686272).

Almost surely, 2^1211343445 is an apocalyptic number.

It is an amenable number.

1211343445 is a deficient number, since it is larger than the sum of its proper divisors (410617259).

1211343445 is a wasteful number, since it uses less digits than its factorization.

1211343445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2293.

The product of its digits is 5760, while the sum is 28.

The square root of 1211343445 is about 34804.3595688816. The cubic root of 1211343445 is about 1065.9964650045.

Adding to 1211343445 its reverse (5443431121), we get a palindrome (6654774566).

The spelling of 1211343445 in words is "one billion, two hundred eleven million, three hundred forty-three thousand, four hundred forty-five".