1211421044 has 24 divisors (see below), whose sum is σ = 2143199520. Its totient is φ = 599096736.

The previous prime is 1211421023. The next prime is 1211421083. The reversal of 1211421044 is 4401241121.

It is a super-3 number, since 3×1211421044³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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, 322127 + ... + 325865.

It is an arithmetic number, because the mean of its divisors is an integer number (89299980).

Almost surely, 2^1211421044 is an apocalyptic number.

It is an amenable number.

1211421044 is a deficient number, since it is larger than the sum of its proper divisors (931778476).

1211421044 is a wasteful number, since it uses less digits than its factorization.

1211421044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4607 (or 4605 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 1211421044 is about 34805.4743395346. The cubic root of 1211421044 is about 1066.0192271957.

Adding to 1211421044 its reverse (4401241121), we get a palindrome (5612662165).

The spelling of 1211421044 in words is "one billion, two hundred eleven million, four hundred twenty-one thousand, forty-four".