21223122203012 has 12 divisors (see below), whose sum is σ = 37259886570816. Its totient is φ = 10577440325640.

The previous prime is 21223122203011. The next prime is 21223122203033. The reversal of 21223122203012 is 21030222132212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21223122203011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8530192568 + ... + 8530195055.

It is an arithmetic number, because the mean of its divisors is an integer number (3104990547568).

Almost surely, 2^{21223122203012} is an apocalyptic number.

It is an amenable number.

21223122203012 is a deficient number, since it is larger than the sum of its proper divisors (16036764367804).

21223122203012 is a wasteful number, since it uses less digits than its factorization.

21223122203012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17060387938 (or 17060387936 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21223122203012 its reverse (21030222132212), we get a palindrome (42253344335224).

The spelling of 21223122203012 in words is "twenty-one trillion, two hundred twenty-three billion, one hundred twenty-two million, two hundred three thousand, twelve".