21142111513 has 8 divisors (see below), whose sum is σ = 21358080000. Its totient is φ = 20926916640.

The previous prime is 21142111493. The next prime is 21142111517. The reversal of 21142111513 is 31511124112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21142111513 - 2¹³ = 21142103321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21142111517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138388 + ... + 247861.

It is an arithmetic number, because the mean of its divisors is an integer number (2669760000).

Almost surely, 2^21142111513 is an apocalyptic number.

It is an amenable number.

21142111513 is a deficient number, since it is larger than the sum of its proper divisors (215968487).

21142111513 is a wasteful number, since it uses less digits than its factorization.

21142111513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386807.

The product of its digits is 240, while the sum is 22.

Adding to 21142111513 its reverse (31511124112), we get a palindrome (52653235625).

The spelling of 21142111513 in words is "twenty-one billion, one hundred forty-two million, one hundred eleven thousand, five hundred thirteen".