21201421300003 has 12 divisors (see below), whose sum is σ = 24692699987352. Its totient is φ = 18150672613920.

The previous prime is 21201421299979. The next prime is 21201421300051. The reversal of 21201421300003 is 30000312410212.

It is a happy number.

It is not a de Polignac number, because 21201421300003 - 2²⁹ = 21200884429091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21201421300063) 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, 261556858 + ... + 261637903.

It is an arithmetic number, because the mean of its divisors is an integer number (2057724998946).

Almost surely, 2^{21201421300003} is an apocalyptic number.

21201421300003 is a deficient number, since it is larger than the sum of its proper divisors (3491278687349).

21201421300003 is an equidigital number, since it uses as much as digits as its factorization.

21201421300003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523195602 (or 523195595 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21201421300003 its reverse (30000312410212), we get a palindrome (51201733710215).

The spelling of 21201421300003 in words is "twenty-one trillion, two hundred one billion, four hundred twenty-one million, three hundred thousand, three".