21230002023212 has 12 divisors (see below), whose sum is σ = 38016515251176. Its totient is φ = 10368140522880.

The previous prime is 21230002023199. The next prime is 21230002023287. The reversal of 21230002023212 is 21232020003212.

It is a happy number.

It is a super-2 number, since 2×21230002023212² (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 3 ways as a sum of consecutive naturals, for example, 61715121989 + ... + 61715122332.

It is an arithmetic number, because the mean of its divisors is an integer number (3168042937598).

Almost surely, 2^{21230002023212} is an apocalyptic number.

It is an amenable number.

21230002023212 is a deficient number, since it is larger than the sum of its proper divisors (16786513227964).

21230002023212 is a wasteful number, since it uses less digits than its factorization.

21230002023212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123430244368 (or 123430244366 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21230002023212 its reverse (21232020003212), we get a palindrome (42462022026424).

The spelling of 21230002023212 in words is "twenty-one trillion, two hundred thirty billion, two million, twenty-three thousand, two hundred twelve".