21230311303212 has 96 divisors (see below), whose sum is σ = 54664038777600. Its totient is φ = 6359437536000.

The previous prime is 21230311303207. The next prime is 21230311303339.

21230311303212 is nontrivially palindromic in base 10.

21230311303212 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×21230311303212² (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 31 ways as a sum of consecutive naturals, for example, 6966214 + ... + 9538802.

It is an arithmetic number, because the mean of its divisors is an integer number (569417070600).

Almost surely, 2^{21230311303212} is an apocalyptic number.

21230311303212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21230311303212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27332019388800).

21230311303212 is an abundant number, since it is smaller than the sum of its proper divisors (33433727474388).

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

21230311303212 is a wasteful number, since it uses less digits than its factorization.

21230311303212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2573327 (or 2573325 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

It can be divided in two parts, 2123031 and 1303212, that added together give a palindrome (3426243).

The spelling of 21230311303212 in words is "twenty-one trillion, two hundred thirty billion, three hundred eleven million, three hundred three thousand, two hundred twelve".