1143211421 has 8 divisors (see below), whose sum is σ = 1254792864. Its totient is φ = 1032905520.

The previous prime is 1143211417. The next prime is 1143211439. The reversal of 1143211421 is 1241123411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1143211421 - 2² = 1143211417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1143211393 and 1143211402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143211411) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 317006 + ... + 320591.

It is an arithmetic number, because the mean of its divisors is an integer number (156849108).

Almost surely, 2^1143211421 is an apocalyptic number.

1143211421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1143211421 is a deficient number, since it is larger than the sum of its proper divisors (111581443).

1143211421 is a wasteful number, since it uses less digits than its factorization.

1143211421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637771.

The product of its digits is 192, while the sum is 20.

The square root of 1143211421 is about 33811.4096275207. The cubic root of 1143211421 is about 1045.6239403240.

Adding to 1143211421 its reverse (1241123411), we get a palindrome (2384334832).

The spelling of 1143211421 in words is "one billion, one hundred forty-three million, two hundred eleven thousand, four hundred twenty-one".