21111020121132 has 48 divisors (see below), whose sum is σ = 54732643079520. Its totient is φ = 7036959303936.

The previous prime is 21111020121089. The next prime is 21111020121143. The reversal of 21111020121132 is 23112102011112.

It is a happy number.

21111020121132 is a `hidden beast` number, since 211 + 1 + 10 + 201 + 211 + 32 = 666.

It is a super-2 number, since 2×21111020121132² (a number of 27 digits) contains 22 as substring.

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

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 17844888 + ... + 18991104.

It is an arithmetic number, because the mean of its divisors is an integer number (1140263397490).

Almost surely, 2^{21111020121132} is an apocalyptic number.

It is an amenable number.

21111020121132 is an abundant number, since it is smaller than the sum of its proper divisors (33621622958388).

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

21111020121132 is a wasteful number, since it uses less digits than its factorization.

21111020121132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1316767 (or 1316759 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 21111020121132 its reverse (23112102011112), we get a palindrome (44223122132244).

The spelling of 21111020121132 in words is "twenty-one trillion, one hundred eleven billion, twenty million, one hundred twenty-one thousand, one hundred thirty-two".