21220031102 has 8 divisors (see below), whose sum is σ = 31830763536. Its totient is φ = 10609776592.

The previous prime is 21220031089. The next prime is 21220031113. The reversal of 21220031102 is 20113002212.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27863 + ... + 207885.

It is an arithmetic number, because the mean of its divisors is an integer number (3978845442).

Almost surely, 2^21220031102 is an apocalyptic number.

21220031102 is a deficient number, since it is larger than the sum of its proper divisors (10610732434).

21220031102 is a wasteful number, since it uses less digits than its factorization.

21220031102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238962.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21220031102 its reverse (20113002212), we get a palindrome (41333033314).

The spelling of 21220031102 in words is "twenty-one billion, two hundred twenty million, thirty-one thousand, one hundred two".