21220101220003 has 4 divisors (see below), whose sum is σ = 24251544251440. Its totient is φ = 18188658188568.

The previous prime is 21220101220001. The next prime is 21220101220009. The reversal of 21220101220003 is 30002210102212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21220101220003 - 2¹ = 21220101220001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21220101220001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1515721515708 + ... + 1515721515721.

It is an arithmetic number, because the mean of its divisors is an integer number (6062886062860).

Almost surely, 2^{21220101220003} is an apocalyptic number.

21220101220003 is a deficient number, since it is larger than the sum of its proper divisors (3031443031437).

21220101220003 is an equidigital number, since it uses as much as digits as its factorization.

21220101220003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3031443031436.

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

Adding to 21220101220003 its reverse (30002210102212), we get a palindrome (51222311322215).

The spelling of 21220101220003 in words is "twenty-one trillion, two hundred twenty billion, one hundred one million, two hundred twenty thousand, three".