21312101010003 has 16 divisors (see below), whose sum is σ = 28898404853760. Its totient is φ = 13966942932896.

The previous prime is 21312101009999. The next prime is 21312101010061. The reversal of 21312101010003 is 30001010121312.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21312101010003 - 2² = 21312101009999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21312101010503) 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, 6810001 + ... + 9433997.

It is an arithmetic number, because the mean of its divisors is an integer number (1806150303360).

Almost surely, 2^{21312101010003} is an apocalyptic number.

21312101010003 is a deficient number, since it is larger than the sum of its proper divisors (7586303843757).

21312101010003 is a wasteful number, since it uses less digits than its factorization.

21312101010003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2669946.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21312101010003 its reverse (30001010121312), we get a palindrome (51313111131315).

The spelling of 21312101010003 in words is "twenty-one trillion, three hundred twelve billion, one hundred one million, ten thousand, three".