21140124213 has 16 divisors (see below), whose sum is σ = 30450825216. Its totient is φ = 12968260800.

The previous prime is 21140124197. The next prime is 21140124253. The reversal of 21140124213 is 31242104112.

It is not a de Polignac number, because 21140124213 - 2⁴ = 21140124197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21140124213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21140124253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 842613 + ... + 867338.

It is an arithmetic number, because the mean of its divisors is an integer number (1903176576).

Almost surely, 2^21140124213 is an apocalyptic number.

It is an amenable number.

21140124213 is a deficient number, since it is larger than the sum of its proper divisors (9310701003).

21140124213 is a wasteful number, since it uses less digits than its factorization.

21140124213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1710284.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21140124213 its reverse (31242104112), we get a palindrome (52382228325).

The spelling of 21140124213 in words is "twenty-one billion, one hundred forty million, one hundred twenty-four thousand, two hundred thirteen".