21202210109 has 8 divisors (see below), whose sum is σ = 21248907552. Its totient is φ = 21155545840.

The previous prime is 21202210069. The next prime is 21202210111. The reversal of 21202210109 is 90101220212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21202210109 - 2³² = 16907242813 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 (21202218109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1604162 + ... + 1617324.

It is an arithmetic number, because the mean of its divisors is an integer number (2656113444).

Almost surely, 2^21202210109 is an apocalyptic number.

It is an amenable number.

21202210109 is a deficient number, since it is larger than the sum of its proper divisors (46697443).

21202210109 is a wasteful number, since it uses less digits than its factorization.

21202210109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16587.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 21202210109 in words is "twenty-one billion, two hundred two million, two hundred ten thousand, one hundred nine".