21103121210319 has 12 divisors (see below), whose sum is σ = 30482401864200. Its totient is φ = 14068694086704.

The previous prime is 21103121210299. The next prime is 21103121210329. The reversal of 21103121210319 is 91301212130112.

21103121210319 is a `hidden beast` number, since 2 + 1 + 10 + 3 + 121 + 210 + 319 = 666.

It is not a de Polignac number, because 21103121210319 - 2⁵ = 21103121210287 is a prime.

It is a super-4 number, since 4×21103121210319⁴ (a number of 54 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 21103121210292 and 21103121210301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103121210329) 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 11 ways as a sum of consecutive naturals, for example, 1866529 + ... + 6759450.

It is an arithmetic number, because the mean of its divisors is an integer number (2540200155350).

Almost surely, 2^{21103121210319} is an apocalyptic number.

21103121210319 is a deficient number, since it is larger than the sum of its proper divisors (9379280653881).

21103121210319 is a wasteful number, since it uses less digits than its factorization.

21103121210319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8897814 (or 8897811 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The spelling of 21103121210319 in words is "twenty-one trillion, one hundred three billion, one hundred twenty-one million, two hundred ten thousand, three hundred nineteen".