21022331111220 has 48 divisors (see below), whose sum is σ = 61421767424640. Its totient is φ = 5362217790336.

The previous prime is 21022331111207. The next prime is 21022331111231. The reversal of 21022331111220 is 2211113322012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7616785255 + ... + 7616788014.

It is an arithmetic number, because the mean of its divisors is an integer number (1279620154680).

Almost surely, 2^{21022331111220} is an apocalyptic number.

21022331111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022331111220 is an abundant number, since it is smaller than the sum of its proper divisors (40399436313420).

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

21022331111220 is a wasteful number, since it uses less digits than its factorization.

21022331111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15233573304 (or 15233573302 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21022331111220 its reverse (2211113322012), we get a palindrome (23233444433232).

The spelling of 21022331111220 in words is "twenty-one trillion, twenty-two billion, three hundred thirty-one million, one hundred eleven thousand, two hundred twenty".