1143401021 has 4 divisors (see below), whose sum is σ = 1306744032. Its totient is φ = 980058012.

The previous prime is 1143400997. The next prime is 1143401027. The reversal of 1143401021 is 1201043411.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1201043411 = 31699 ⋅37889.

It is a cyclic number.

It is not a de Polignac number, because 1143401021 - 2⁶ = 1143400957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143401027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81671495 + ... + 81671508.

It is an arithmetic number, because the mean of its divisors is an integer number (326686008).

Almost surely, 2^1143401021 is an apocalyptic number.

It is an amenable number.

1143401021 is a deficient number, since it is larger than the sum of its proper divisors (163343011).

1143401021 is an equidigital number, since it uses as much as digits as its factorization.

1143401021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163343010.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1143401021 is about 33814.2132985524. The cubic root of 1143401021 is about 1045.6817422133.

Adding to 1143401021 its reverse (1201043411), we get a palindrome (2344444432).

The spelling of 1143401021 in words is "one billion, one hundred forty-three million, four hundred one thousand, twenty-one".