1144321400021 has 2 divisors, whose sum is σ = 1144321400022. Its totient is φ = 1144321400020.

The previous prime is 1144321400017. The next prime is 1144321400023. The reversal of 1144321400021 is 1200041234411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1142215875025 + 2105524996 = 1068745^2 + 45886^2 .

It is a cyclic number.

It is not a de Polignac number, because 1144321400021 - 2² = 1144321400017 is a prime.

Together with 1144321400023, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1144321400021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1144321400023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572160700010 + 572160700011.

It is an arithmetic number, because the mean of its divisors is an integer number (572160700011).

Almost surely, 2^{1144321400021} is an apocalyptic number.

It is an amenable number.

1144321400021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1144321400021 is an equidigital number, since it uses as much as digits as its factorization.

1144321400021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 1144321400021 its reverse (1200041234411), we get a palindrome (2344362634432).

The spelling of 1144321400021 in words is "one trillion, one hundred forty-four billion, three hundred twenty-one million, four hundred thousand, twenty-one".