21301230321112 has 128 divisors (see below), whose sum is σ = 47882436940800. Its totient is φ = 8685935774208.

The previous prime is 21301230321079. The next prime is 21301230321307. The reversal of 21301230321112 is 21112303210312.

It is a super-2 number, since 2×21301230321112² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1986493783 + ... + 1986504505.

It is an arithmetic number, because the mean of its divisors is an integer number (374081538600).

Almost surely, 2^{21301230321112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21301230321112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23941218470400).

21301230321112 is an abundant number, since it is smaller than the sum of its proper divisors (26581206619688).

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

21301230321112 is a wasteful number, since it uses less digits than its factorization.

21301230321112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18785 (or 18781 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21301230321112 its reverse (21112303210312), we get a palindrome (42413533531424).

The spelling of 21301230321112 in words is "twenty-one trillion, three hundred one billion, two hundred thirty million, three hundred twenty-one thousand, one hundred twelve".