21014451213 has 64 divisors (see below), whose sum is σ = 35149086720. Its totient is φ = 10890547200.

The previous prime is 21014451203. The next prime is 21014451223. The reversal of 21014451213 is 31215441012.

It is an interprime number because it is at equal distance from previous prime (21014451203) and next prime (21014451223).

It is not a de Polignac number, because 21014451213 - 2¹² = 21014447117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014451203) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2663208 + ... + 2671086.

It is an arithmetic number, because the mean of its divisors is an integer number (549204480).

Almost surely, 2^21014451213 is an apocalyptic number.

It is an amenable number.

21014451213 is a deficient number, since it is larger than the sum of its proper divisors (14134635507).

21014451213 is a wasteful number, since it uses less digits than its factorization.

21014451213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8178.

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 21014451213 its reverse (31215441012), we get a palindrome (52229892225).

The spelling of 21014451213 in words is "twenty-one billion, fourteen million, four hundred fifty-one thousand, two hundred thirteen".