1211004421 has 12 divisors (see below), whose sum is σ = 1336052032. Its totient is φ = 1096821000.

The previous prime is 1211004409. The next prime is 1211004427. The reversal of 1211004421 is 1244001121.

It is a happy number.

It is not a de Polignac number, because 1211004421 - 2⁹ = 1211003909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211004395 and 1211004404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211004427) 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 11 ways as a sum of consecutive naturals, for example, 14326 + ... + 51256.

Almost surely, 2^1211004421 is an apocalyptic number.

1211004421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1211004421 is a deficient number, since it is larger than the sum of its proper divisors (125047611).

1211004421 is a wasteful number, since it uses less digits than its factorization.

1211004421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37224 (or 37213 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1211004421 is about 34799.4888037166. The cubic root of 1211004421 is about 1065.8970073575.

Adding to 1211004421 its reverse (1244001121), we get a palindrome (2455005542).

It can be divided in two parts, 121100 and 4421, that added together give a palindrome (125521).

The spelling of 1211004421 in words is "one billion, two hundred eleven million, four thousand, four hundred twenty-one".