21021401143 has 2 divisors, whose sum is σ = 21021401144. Its totient is φ = 21021401142.

The previous prime is 21021401123. The next prime is 21021401197. The reversal of 21021401143 is 34110412012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21021401143 - 2¹⁷ = 21021270071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21021401143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21021401123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510700571 + 10510700572.

It is an arithmetic number, because the mean of its divisors is an integer number (10510700572).

Almost surely, 2^21021401143 is an apocalyptic number.

21021401143 is a deficient number, since it is larger than the sum of its proper divisors (1).

21021401143 is an equidigital number, since it uses as much as digits as its factorization.

21021401143 is an odious number, because the sum of its binary digits is odd.

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

Adding to 21021401143 its reverse (34110412012), we get a palindrome (55131813155).

The spelling of 21021401143 in words is "twenty-one billion, twenty-one million, four hundred one thousand, one hundred forty-three".