21000220101103 has 4 divisors (see below), whose sum is σ = 21356156035080. Its totient is φ = 20644284167128.

The previous prime is 21000220101101. The next prime is 21000220101109. The reversal of 21000220101103 is 30110102200012.

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

It is a cyclic number.

It is not a de Polignac number, because 21000220101103 - 2¹ = 21000220101101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000220101101) 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, 177967966900 + ... + 177967967017.

It is an arithmetic number, because the mean of its divisors is an integer number (5339039008770).

Almost surely, 2^{21000220101103} is an apocalyptic number.

21000220101103 is a deficient number, since it is larger than the sum of its proper divisors (355935933977).

21000220101103 is an equidigital number, since it uses as much as digits as its factorization.

21000220101103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355935933976.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21000220101103 its reverse (30110102200012), we get a palindrome (51110322301115).

The spelling of 21000220101103 in words is "twenty-one trillion, two hundred twenty million, one hundred one thousand, one hundred three".