21212110310003 has 8 divisors (see below), whose sum is σ = 21272406046416. Its totient is φ = 21151815731200.

The previous prime is 21212110309991. The next prime is 21212110310011. The reversal of 21212110310003 is 30001301121212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21212110310003 is a prime.

It is a super-3 number, since 3×21212110310003³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21212110310093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47691683 + ... + 48134403.

It is an arithmetic number, because the mean of its divisors is an integer number (2659050755802).

Almost surely, 2^{21212110310003} is an apocalyptic number.

21212110310003 is a deficient number, since it is larger than the sum of its proper divisors (60295736413).

21212110310003 is a wasteful number, since it uses less digits than its factorization.

21212110310003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578805.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21212110310003 its reverse (30001301121212), we get a palindrome (51213411431215).

The spelling of 21212110310003 in words is "twenty-one trillion, two hundred twelve billion, one hundred ten million, three hundred ten thousand, three".