21002401403 has 2 divisors, whose sum is σ = 21002401404. Its totient is φ = 21002401402.

The previous prime is 21002401363. The next prime is 21002401481. The reversal of 21002401403 is 30410420012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21002401403 - 2⁶ = 21002401339 is a prime.

It is a super-2 number, since 2×21002401403² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21002421403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501200701 + 10501200702.

It is an arithmetic number, because the mean of its divisors is an integer number (10501200702).

Almost surely, 2^21002401403 is an apocalyptic number.

21002401403 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002401403 is an equidigital number, since it uses as much as digits as its factorization.

21002401403 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 17.

Adding to 21002401403 its reverse (30410420012), we get a palindrome (51412821415).

The spelling of 21002401403 in words is "twenty-one billion, two million, four hundred one thousand, four hundred three".