21203120312113 has 8 divisors (see below), whose sum is σ = 21295445004288. Its totient is φ = 21110806938144.

The previous prime is 21203120312111. The next prime is 21203120312137. The reversal of 21203120312113 is 31121302130212.

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 21203120312113 - 2¹ = 21203120312111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21203120312111) 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, 936220 + ... + 6578962.

It is an arithmetic number, because the mean of its divisors is an integer number (2661930625536).

Almost surely, 2^{21203120312113} is an apocalyptic number.

It is an amenable number.

21203120312113 is a deficient number, since it is larger than the sum of its proper divisors (92324692175).

21203120312113 is a wasteful number, since it uses less digits than its factorization.

21203120312113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5659103.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21203120312113 its reverse (31121302130212), we get a palindrome (52324422442325).

The spelling of 21203120312113 in words is "twenty-one trillion, two hundred three billion, one hundred twenty million, three hundred twelve thousand, one hundred thirteen".