1144231021 has 2 divisors, whose sum is σ = 1144231022. Its totient is φ = 1144231020.

The previous prime is 1144231013. The next prime is 1144231037. The reversal of 1144231021 is 1201324411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 865006921 + 279224100 = 29411^2 + 16710^2 .

It is a cyclic number.

It is not a de Polignac number, because 1144231021 - 2³ = 1144231013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1144231021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1144231001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572115510 + 572115511.

It is an arithmetic number, because the mean of its divisors is an integer number (572115511).

Almost surely, 2^1144231021 is an apocalyptic number.

It is an amenable number.

1144231021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1144231021 is an equidigital number, since it uses as much as digits as its factorization.

1144231021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1144231021 is about 33826.4840177042. The cubic root of 1144231021 is about 1045.9347027252.

Adding to 1144231021 its reverse (1201324411), we get a palindrome (2345555432).

The spelling of 1144231021 in words is "one billion, one hundred forty-four million, two hundred thirty-one thousand, twenty-one".