21001031113003 has 12 divisors (see below), whose sum is σ = 22218322802760. Its totient is φ = 19845919354976.

The previous prime is 21001031112961. The next prime is 21001031113031. The reversal of 21001031113003 is 30031113010012.

It is not a de Polignac number, because 21001031113003 - 2²¹ = 21001029015851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21001031113033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 239109658 + ... + 239197471.

It is an arithmetic number, because the mean of its divisors is an integer number (1851526900230).

Almost surely, 2^{21001031113003} is an apocalyptic number.

21001031113003 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21001031113003 is a deficient number, since it is larger than the sum of its proper divisors (1217291689757).

21001031113003 is an equidigital number, since it uses as much as digits as its factorization.

21001031113003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478307258 (or 478307235 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 21001031113003 its reverse (30031113010012), we get a palindrome (51032144123015).

The spelling of 21001031113003 in words is "twenty-one trillion, one billion, thirty-one million, one hundred thirteen thousand, three".