21131213030003 has 4 divisors (see below), whose sum is σ = 21135135666360. Its totient is φ = 21127290393648.

The previous prime is 21131213029999. The next prime is 21131213030027. The reversal of 21131213030003 is 30003031213112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21131213030003 - 2² = 21131213029999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21131213030203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1961310098 + ... + 1961320871.

It is an arithmetic number, because the mean of its divisors is an integer number (5283783916590).

Almost surely, 2^{21131213030003} is an apocalyptic number.

21131213030003 is a deficient number, since it is larger than the sum of its proper divisors (3922636357).

21131213030003 is an equidigital number, since it uses as much as digits as its factorization.

21131213030003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3922636356.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21131213030003 its reverse (30003031213112), we get a palindrome (51134244243115).

The spelling of 21131213030003 in words is "twenty-one trillion, one hundred thirty-one billion, two hundred thirteen million, thirty thousand, three".