21222231003120 has 640 divisors, whose sum is σ = 81321515089920. Its totient is φ = 4469769216000.

The previous prime is 21222231003119. The next prime is 21222231003167. The reversal of 21222231003120 is 2130013222212.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 433161825 + ... + 433210815.

It is an arithmetic number, because the mean of its divisors is an integer number (127064867328).

Almost surely, 2^{21222231003120} is an apocalyptic number.

21222231003120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21222231003120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40660757544960).

21222231003120 is an abundant number, since it is smaller than the sum of its proper divisors (60099284086800).

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

21222231003120 is a wasteful number, since it uses less digits than its factorization.

21222231003120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49405 (or 49399 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21222231003120 its reverse (2130013222212), we get a palindrome (23352244225332).

The spelling of 21222231003120 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred thirty-one million, three thousand, one hundred twenty".