21140525140312 has 32 divisors (see below), whose sum is σ = 41005951110000. Its totient is φ = 10205615905408.

The previous prime is 21140525140291. The next prime is 21140525140313. The reversal of 21140525140312 is 21304152504112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21140525140313) 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, 15441639 + ... + 16754857.

Almost surely, 2^{21140525140312} is an apocalyptic number.

It is an amenable number.

21140525140312 is a deficient number, since it is larger than the sum of its proper divisors (19865425969688).

21140525140312 is a wasteful number, since it uses less digits than its factorization.

21140525140312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1382643 (or 1382639 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

Adding to 21140525140312 its reverse (21304152504112), we get a palindrome (42444677644424).

The spelling of 21140525140312 in words is "twenty-one trillion, one hundred forty billion, five hundred twenty-five million, one hundred forty thousand, three hundred twelve".