21030112012312 has 32 divisors (see below), whose sum is σ = 44699630799600. Its totient is φ = 9195352619904.

The previous prime is 21030112012303. The next prime is 21030112012319. The reversal of 21030112012312 is 21321021103012.

It is a super-2 number, since 2×21030112012312² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 21030112012312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030112012319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5321382643 + ... + 5321386594.

Almost surely, 2^{21030112012312} is an apocalyptic number.

It is an amenable number.

21030112012312 is an abundant number, since it is smaller than the sum of its proper divisors (23669518787288).

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

21030112012312 is a wasteful number, since it uses less digits than its factorization.

21030112012312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10642769275 (or 10642769271 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21030112012312 its reverse (21321021103012), we get a palindrome (42351133115324).

The spelling of 21030112012312 in words is "twenty-one trillion, thirty billion, one hundred twelve million, twelve thousand, three hundred twelve".