21232100123212 has 24 divisors (see below), whose sum is σ = 40547225759040. Its totient is φ = 9647807831760.

The previous prime is 21232100123167. The next prime is 21232100123219.

21232100123212 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (21232100123219) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 78532762 + ... + 78802657.

It is an arithmetic number, because the mean of its divisors is an integer number (1689467739960).

Almost surely, 2^{21232100123212} is an apocalyptic number.

21232100123212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21232100123212 is a deficient number, since it is larger than the sum of its proper divisors (19315125635828).

21232100123212 is a wasteful number, since it uses less digits than its factorization.

21232100123212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157338501 (or 157338499 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

It can be divided in two parts, 21232100 and 123212, that added together give a palindrome (21355312).

The spelling of 21232100123212 in words is "twenty-one trillion, two hundred thirty-two billion, one hundred million, one hundred twenty-three thousand, two hundred twelve".