1211421444 has 12 divisors (see below), whose sum is σ = 2826650064. Its totient is φ = 403807144.

The previous prime is 1211421397. The next prime is 1211421461. The reversal of 1211421444 is 4441241121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×1211421444³ (a number of 28 digits) contains 333 as substring.

It is a nude number because it is divisible by every one of its digits.

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, 50475882 + ... + 50475905.

It is an arithmetic number, because the mean of its divisors is an integer number (235554172).

Almost surely, 2^1211421444 is an apocalyptic number.

It is an amenable number.

1211421444 is an abundant number, since it is smaller than the sum of its proper divisors (1615228620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211421444 is a wasteful number, since it uses less digits than its factorization.

1211421444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100951794 (or 100951792 counting only the distinct ones).

The product of its digits is 1024, while the sum is 24.

The square root of 1211421444 is about 34805.4800857566. The cubic root of 1211421444 is about 1066.0193445256.

Adding to 1211421444 its reverse (4441241121), we get a palindrome (5652662565).

The spelling of 1211421444 in words is "one billion, two hundred eleven million, four hundred twenty-one thousand, four hundred forty-four".