21002034050401 has 12 divisors (see below), whose sum is σ = 22171917810000. Its totient is φ = 19890976255128.

The previous prime is 21002034050399. The next prime is 21002034050453. The reversal of 21002034050401 is 10405043020012.

It is not a de Polignac number, because 21002034050401 - 2¹ = 21002034050399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21002034050201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7050291 + ... + 9576568.

It is an arithmetic number, because the mean of its divisors is an integer number (1847659817500).

Almost surely, 2^{21002034050401} is an apocalyptic number.

It is an amenable number.

21002034050401 is a deficient number, since it is larger than the sum of its proper divisors (1169883759599).

21002034050401 is a wasteful number, since it uses less digits than its factorization.

21002034050401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16630396 (or 16630377 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 21002034050401 its reverse (10405043020012), we get a palindrome (31407077070413).

The spelling of 21002034050401 in words is "twenty-one trillion, two billion, thirty-four million, fifty thousand, four hundred one".