21223432212 has 48 divisors (see below), whose sum is σ = 53536607040. Its totient is φ = 6520995072.

The previous prime is 21223432211. The next prime is 21223432261.

21223432212 is nontrivially palindromic in base 10.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223432211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1249473 + ... + 1266344.

It is an arithmetic number, because the mean of its divisors is an integer number (1115345980).

Almost surely, 2^21223432212 is an apocalyptic number.

It is an amenable number.

21223432212 is an abundant number, since it is smaller than the sum of its proper divisors (32313174828).

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

21223432212 is a wasteful number, since it uses less digits than its factorization.

21223432212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2515880 (or 2515878 counting only the distinct ones).

The product of its digits is 2304, while the sum is 24.

The spelling of 21223432212 in words is "twenty-one billion, two hundred twenty-three million, four hundred thirty-two thousand, two hundred twelve".