21201002221003 has 16 divisors (see below), whose sum is σ = 24205561376256. Its totient is φ = 18380948826240.

The previous prime is 21201002220967. The next prime is 21201002221031. The reversal of 21201002221003 is 30012220010212.

It is a happy number.

It is not a de Polignac number, because 21201002221003 - 2²¹ = 21201000123851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21201002221403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124244751 + ... + 124415272.

It is an arithmetic number, because the mean of its divisors is an integer number (1512847586016).

Almost surely, 2^{21201002221003} is an apocalyptic number.

21201002221003 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21201002221003 is a deficient number, since it is larger than the sum of its proper divisors (3004559155253).

21201002221003 is a wasteful number, since it uses less digits than its factorization.

21201002221003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248660394.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21201002221003 its reverse (30012220010212), we get a palindrome (51213222231215).

The spelling of 21201002221003 in words is "twenty-one trillion, two hundred one billion, two million, two hundred twenty-one thousand, three".