21223122132212 has 144 divisors (see below), whose sum is σ = 50256473008896. Its totient is φ = 7630902259200.

The previous prime is 21223122132211. The next prime is 21223122132241.

21223122132212 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223122132211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 195545153 + ... + 195653655.

It is an arithmetic number, because the mean of its divisors is an integer number (349003284784).

Almost surely, 2^{21223122132212} is an apocalyptic number.

21223122132212 is a gapful number since it is divisible by the number (22) 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 21223122132212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25128236504448).

21223122132212 is an abundant number, since it is smaller than the sum of its proper divisors (29033350876684).

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

21223122132212 is a wasteful number, since it uses less digits than its factorization.

21223122132212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112990 (or 112977 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

It can be divided in two parts, 2122312 and 2132212, that added together give a palindrome (4254524).

The spelling of 21223122132212 in words is "twenty-one trillion, two hundred twenty-three billion, one hundred twenty-two million, one hundred thirty-two thousand, two hundred twelve".