1211321404 has 24 divisors (see below), whose sum is σ = 2283337728. Its totient is φ = 560638320.

The previous prime is 1211321399. The next prime is 1211321407. The reversal of 1211321404 is 4041231121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211321407) 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 7 ways as a sum of consecutive naturals, for example, 209512 + ... + 215215.

It is an arithmetic number, because the mean of its divisors is an integer number (95139072).

Almost surely, 2^1211321404 is an apocalyptic number.

It is an amenable number.

1211321404 is a deficient number, since it is larger than the sum of its proper divisors (1072016324).

1211321404 is a wasteful number, since it uses less digits than its factorization.

1211321404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424785 (or 424783 counting only the distinct ones).

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

The square root of 1211321404 is about 34804.0429260740. The cubic root of 1211321404 is about 1065.9899995190.

Adding to 1211321404 its reverse (4041231121), we get a palindrome (5252552525).

The spelling of 1211321404 in words is "one billion, two hundred eleven million, three hundred twenty-one thousand, four hundred four".