21120221102 has 8 divisors (see below), whose sum is σ = 31681935000. Its totient is φ = 10559576104.

The previous prime is 21120221071. The next prime is 21120221117. The reversal of 21120221102 is 20112202112.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215852 + ... + 298047.

It is an arithmetic number, because the mean of its divisors is an integer number (3960241875).

Almost surely, 2^21120221102 is an apocalyptic number.

21120221102 is a deficient number, since it is larger than the sum of its proper divisors (10561713898).

21120221102 is a wasteful number, since it uses less digits than its factorization.

21120221102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534450.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21120221102 its reverse (20112202112), we get a palindrome (41232423214).

The spelling of 21120221102 in words is "twenty-one billion, one hundred twenty million, two hundred twenty-one thousand, one hundred two".