21401143033 has 2 divisors, whose sum is σ = 21401143034. Its totient is φ = 21401143032.

The previous prime is 21401143007. The next prime is 21401143087. The reversal of 21401143033 is 33034110412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13542675129 + 7858467904 = 116373^2 + 88648^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21401143033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21401142995 and 21401143013.

It is not a weakly prime, because it can be changed into another prime (21401143133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10700571516 + 10700571517.

It is an arithmetic number, because the mean of its divisors is an integer number (10700571517).

Almost surely, 2^21401143033 is an apocalyptic number.

It is an amenable number.

21401143033 is a deficient number, since it is larger than the sum of its proper divisors (1).

21401143033 is an equidigital number, since it uses as much as digits as its factorization.

21401143033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21401143033 its reverse (33034110412), we get a palindrome (54435253445).

The spelling of 21401143033 in words is "twenty-one billion, four hundred one million, one hundred forty-three thousand, thirty-three".