21111332201012 has 6 divisors (see below), whose sum is σ = 36944831351778. Its totient is φ = 10555666100504.

The previous prime is 21111332200993. The next prime is 21111332201017. The reversal of 21111332201012 is 21010223311112.

It can be written as a sum of positive squares in only one way, i.e., 20469417170596 + 641915030416 = 4524314^2 + 801196^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111332201017) 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 as a sum of consecutive naturals, namely, 2638916525123 + ... + 2638916525130.

It is an arithmetic number, because the mean of its divisors is an integer number (6157471891963).

Almost surely, 2^{21111332201012} is an apocalyptic number.

It is an amenable number.

21111332201012 is a deficient number, since it is larger than the sum of its proper divisors (15833499150766).

21111332201012 is a wasteful number, since it uses less digits than its factorization.

21111332201012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5277833050257 (or 5277833050255 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21111332201012 its reverse (21010223311112), we get a palindrome (42121555512124).

The spelling of 21111332201012 in words is "twenty-one trillion, one hundred eleven billion, three hundred thirty-two million, two hundred one thousand, twelve".