21121132331982 has 16 divisors (see below), whose sum is σ = 42316504151760. Its totient is φ = 7028004196032.

The previous prime is 21121132331941. The next prime is 21121132331987. The reversal of 21121132331982 is 28913323112112.

It is a happy number.

It is a super-2 number, since 2×21121132331982² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21121132331982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121132331987) 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, 3093308293 + ... + 3093315120.

It is an arithmetic number, because the mean of its divisors is an integer number (2644781509485).

Almost surely, 2^{21121132331982} is an apocalyptic number.

21121132331982 is an abundant number, since it is smaller than the sum of its proper divisors (21195371819778).

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

21121132331982 is a wasteful number, since it uses less digits than its factorization.

21121132331982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6186623987.

The product of its digits is 31104, while the sum is 39.

The spelling of 21121132331982 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred thirty-two million, three hundred thirty-one thousand, nine hundred eighty-two".