21012002312203 has 32 divisors (see below), whose sum is σ = 25656087744000. Its totient is φ = 16806920511744.

The previous prime is 21012002312179. The next prime is 21012002312219. The reversal of 21012002312203 is 30221320021012.

It is not a de Polignac number, because 21012002312203 - 2⁹ = 21012002311691 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (21012002312263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 252576351 + ... + 252659527.

It is an arithmetic number, because the mean of its divisors is an integer number (801752742000).

Almost surely, 2^{21012002312203} is an apocalyptic number.

21012002312203 is a deficient number, since it is larger than the sum of its proper divisors (4644085431797).

21012002312203 is a wasteful number, since it uses less digits than its factorization.

21012002312203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111619.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21012002312203 its reverse (30221320021012), we get a palindrome (51233322333215).

The spelling of 21012002312203 in words is "twenty-one trillion, twelve billion, two million, three hundred twelve thousand, two hundred three".