21331554140012 has 6 divisors (see below), whose sum is σ = 37330219745028. Its totient is φ = 10665777070004.

The previous prime is 21331554139999. The next prime is 21331554140023. The reversal of 21331554140012 is 21004145513312.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2666444267498 + ... + 2666444267505.

It is an arithmetic number, because the mean of its divisors is an integer number (6221703290838).

Almost surely, 2^{21331554140012} is an apocalyptic number.

It is an amenable number.

21331554140012 is a deficient number, since it is larger than the sum of its proper divisors (15998665605016).

21331554140012 is a wasteful number, since it uses less digits than its factorization.

21331554140012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5332888535007 (or 5332888535005 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 21331554140012 its reverse (21004145513312), we get a palindrome (42335699653324).

The spelling of 21331554140012 in words is "twenty-one trillion, three hundred thirty-one billion, five hundred fifty-four million, one hundred forty thousand, twelve".