21103230313212 has 12 divisors (see below), whose sum is σ = 49240870730856. Its totient is φ = 7034410104400.

The previous prime is 21103230313211. The next prime is 21103230313213. The reversal of 21103230313212 is 21231303230112.

It is an interprime number because it is at equal distance from previous prime (21103230313211) and next prime (21103230313213).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103230313211) 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, 879301263039 + ... + 879301263062.

It is an arithmetic number, because the mean of its divisors is an integer number (4103405894238).

Almost surely, 2^{21103230313212} is an apocalyptic number.

It is an amenable number.

21103230313212 is an abundant number, since it is smaller than the sum of its proper divisors (28137640417644).

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

21103230313212 is a wasteful number, since it uses less digits than its factorization.

21103230313212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1758602526108 (or 1758602526106 counting only the distinct ones).

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

Adding to 21103230313212 its reverse (21231303230112), we get a palindrome (42334533543324).

The spelling of 21103230313212 in words is "twenty-one trillion, one hundred three billion, two hundred thirty million, three hundred thirteen thousand, two hundred twelve".