21310000012103 has 16 divisors (see below), whose sum is σ = 23688322944000. Its totient is φ = 19008636547680.

The previous prime is 21310000012069. The next prime is 21310000012127. The reversal of 21310000012103 is 30121000001312.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21310000012103 is a prime.

It is a super-2 number, since 2×21310000012103² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310000012403) 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, 86153903 + ... + 86400896.

It is an arithmetic number, because the mean of its divisors is an integer number (1480520184000).

Almost surely, 2^{21310000012103} is an apocalyptic number.

21310000012103 is a deficient number, since it is larger than the sum of its proper divisors (2378322931897).

21310000012103 is a wasteful number, since it uses less digits than its factorization.

21310000012103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172555022.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21310000012103 its reverse (30121000001312), we get a palindrome (51431000013415).

The spelling of 21310000012103 in words is "twenty-one trillion, three hundred ten billion, twelve thousand, one hundred three".