21311200330212 has 24 divisors (see below), whose sum is σ = 53551221342976. Its totient is φ = 6557292409248.

The previous prime is 21311200330151. The next prime is 21311200330219. The reversal of 21311200330212 is 21203300211312.

It is not an unprimeable number, because it can be changed into a prime (21311200330219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68305129108 + ... + 68305129419.

Almost surely, 2^{21311200330212} is an apocalyptic number.

It is an amenable number.

21311200330212 is an abundant number, since it is smaller than the sum of its proper divisors (32240021012764).

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

21311200330212 is a wasteful number, since it uses less digits than its factorization.

21311200330212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136610258547 (or 136610258545 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21311200330212 its reverse (21203300211312), we get a palindrome (42514500541524).

The spelling of 21311200330212 in words is "twenty-one trillion, three hundred eleven billion, two hundred million, three hundred thirty thousand, two hundred twelve".