21221134140012 has 24 divisors (see below), whose sum is σ = 52428684346416. Its totient is φ = 6657610710528.

The previous prime is 21221134139971. The next prime is 21221134140023. The reversal of 21221134140012 is 21004143112212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52012583473 + ... + 52012583880.

It is an arithmetic number, because the mean of its divisors is an integer number (2184528514434).

Almost surely, 2^{21221134140012} is an apocalyptic number.

It is an amenable number.

21221134140012 is an abundant number, since it is smaller than the sum of its proper divisors (31207550206404).

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

21221134140012 is a wasteful number, since it uses less digits than its factorization.

21221134140012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104025167377 (or 104025167375 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 21221134140012 its reverse (21004143112212), we get a palindrome (42225277252224).

The spelling of 21221134140012 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred thirty-four million, one hundred forty thousand, twelve".