21140550302312 has 24 divisors (see below), whose sum is σ = 46110128849010. Its totient is φ = 9060235843680.

The previous prime is 21140550302299. The next prime is 21140550302317. The reversal of 21140550302312 is 21320305504112.

It can be written as a sum of positive squares in only one way, i.e., 17763578078596 + 3376972223716 = 4214686^2 + 1837654^2 .

It is not an unprimeable number, because it can be changed into a prime (21140550302317) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26964987239 + ... + 26964988022.

Almost surely, 2^{21140550302312} is an apocalyptic number.

It is an amenable number.

21140550302312 is an abundant number, since it is smaller than the sum of its proper divisors (24969578546698).

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

21140550302312 is a wasteful number, since it uses less digits than its factorization.

21140550302312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53929975281 (or 53929975270 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 21140550302312 its reverse (21320305504112), we get a palindrome (42460855806424).

The spelling of 21140550302312 in words is "twenty-one trillion, one hundred forty billion, five hundred fifty million, three hundred two thousand, three hundred twelve".