21102221003320 has 32 divisors (see below), whose sum is σ = 47500667902800. Its totient is φ = 8437213619968.

The previous prime is 21102221003209. The next prime is 21102221003407. The reversal of 21102221003320 is 2330012220112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114743890 + ... + 114927649.

Almost surely, 2^{21102221003320} is an apocalyptic number.

21102221003320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21102221003320 is an abundant number, since it is smaller than the sum of its proper divisors (26398446899480).

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

21102221003320 is a wasteful number, since it uses less digits than its factorization.

21102221003320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229673847 (or 229673843 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21102221003320 its reverse (2330012220112), we get a palindrome (23432233223432).

The spelling of 21102221003320 in words is "twenty-one trillion, one hundred two billion, two hundred twenty-one million, three thousand, three hundred twenty".