21220048213 has 16 divisors (see below), whose sum is σ = 26120699136. Its totient is φ = 16787099520.

The previous prime is 21220048177. The next prime is 21220048237. The reversal of 21220048213 is 31284002212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21220048213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220048243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 907833 + ... + 930913.

It is an arithmetic number, because the mean of its divisors is an integer number (1632543696).

Almost surely, 2^21220048213 is an apocalyptic number.

It is an amenable number.

21220048213 is a deficient number, since it is larger than the sum of its proper divisors (4900650923).

21220048213 is a wasteful number, since it uses less digits than its factorization.

21220048213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33204.

The product of its (nonzero) digits is 1536, while the sum is 25.

The spelling of 21220048213 in words is "twenty-one billion, two hundred twenty million, forty-eight thousand, two hundred thirteen".