21232020210012 has 36 divisors (see below), whose sum is σ = 54011674922296. Its totient is φ = 7032261468960.

The previous prime is 21232020210007. The next prime is 21232020210013. The reversal of 21232020210012 is 21001202023212.

21232020210012 is a `hidden beast` number, since 212 + 320 + 20 + 2 + 100 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232020210013) 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 11 ways as a sum of consecutive naturals, for example, 1878269314 + ... + 1878280617.

Almost surely, 2^{21232020210012} is an apocalyptic number.

It is an amenable number.

21232020210012 is an abundant number, since it is smaller than the sum of its proper divisors (32779654712284).

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

21232020210012 is a wasteful number, since it uses less digits than its factorization.

21232020210012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3756550098 (or 3756550093 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21232020210012 its reverse (21001202023212), we get a palindrome (42233222233224).

The spelling of 21232020210012 in words is "twenty-one trillion, two hundred thirty-two billion, twenty million, two hundred ten thousand, twelve".