21220032102 has 8 divisors (see below), whose sum is σ = 42440064216. Its totient is φ = 7073344032.

The previous prime is 21220032101. The next prime is 21220032133. The reversal of 21220032102 is 20123002212.

It is a happy number.

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

21220032102 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220032101) 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, 1768336003 + ... + 1768336014.

It is an arithmetic number, because the mean of its divisors is an integer number (5305008027).

Almost surely, 2^21220032102 is an apocalyptic number.

21220032102 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21220032102 is a wasteful number, since it uses less digits than its factorization.

21220032102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3536672022.

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

Adding to 21220032102 its reverse (20123002212), we get a palindrome (41343034314).

The spelling of 21220032102 in words is "twenty-one billion, two hundred twenty million, thirty-two thousand, one hundred two".