21222016344152 has 96 divisors (see below), whose sum is σ = 44541032664960. Its totient is φ = 9465281280000.

The previous prime is 21222016344143. The next prime is 21222016344167. The reversal of 21222016344152 is 25144361022212.

It is a super-2 number, since 2×21222016344152² (a number of 27 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29019152 + ... + 29741472.

It is an arithmetic number, because the mean of its divisors is an integer number (463969090260).

Almost surely, 2^{21222016344152} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21222016344152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22270516332480).

21222016344152 is an abundant number, since it is smaller than the sum of its proper divisors (23319016320808).

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

21222016344152 is a wasteful number, since it uses less digits than its factorization.

21222016344152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723085 (or 723068 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 35.

Adding to 21222016344152 its reverse (25144361022212), we get a palindrome (46366377366364).

The spelling of 21222016344152 in words is "twenty-one trillion, two hundred twenty-two billion, sixteen million, three hundred forty-four thousand, one hundred fifty-two".