21202022103 has 4 divisors (see below), whose sum is σ = 28269362808. Its totient is φ = 14134681400.

The previous prime is 21202022071. The next prime is 21202022117. The reversal of 21202022103 is 30122020212.

It is a happy number.

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 21202022103 - 2⁵ = 21202022071 is a prime.

It is a super-2 number, since 2×21202022103² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202022183) 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, 3533670348 + ... + 3533670353.

It is an arithmetic number, because the mean of its divisors is an integer number (7067340702).

Almost surely, 2^21202022103 is an apocalyptic number.

21202022103 is a deficient number, since it is larger than the sum of its proper divisors (7067340705).

21202022103 is an equidigital number, since it uses as much as digits as its factorization.

21202022103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7067340704.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21202022103 its reverse (30122020212), we get a palindrome (51324042315).

The spelling of 21202022103 in words is "twenty-one billion, two hundred two million, twenty-two thousand, one hundred three".