21234222243212 has 48 divisors (see below), whose sum is σ = 40794762624000. Its totient is φ = 9590925864960.

The previous prime is 21234222243181. The next prime is 21234222243251.

21234222243212 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21234222243212² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5156573 + ... + 8310155.

It is an arithmetic number, because the mean of its divisors is an integer number (849890888000).

Almost surely, 2^{21234222243212} is an apocalyptic number.

21234222243212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21234222243212 is a deficient number, since it is larger than the sum of its proper divisors (19560540380788).

21234222243212 is a wasteful number, since it uses less digits than its factorization.

21234222243212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3154566 (or 3154564 counting only the distinct ones).

The product of its digits is 36864, while the sum is 32.

It can be divided in two parts, 2123422 and 2243212, that added together give a palindrome (4366634).

The spelling of 21234222243212 in words is "twenty-one trillion, two hundred thirty-four billion, two hundred twenty-two million, two hundred forty-three thousand, two hundred twelve".