21220219213 has 8 divisors (see below), whose sum is σ = 23243242680. Its totient is φ = 19283281920.

The previous prime is 21220219211. The next prime is 21220219219. The reversal of 21220219213 is 31291202212.

It can be written as a sum of positive squares in 4 ways, for example, as 12309236809 + 8910982404 = 110947^2 + 94398^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 21220219213 - 2¹ = 21220219211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220219211) 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, 21521028 + ... + 21522013.

It is an arithmetic number, because the mean of its divisors is an integer number (2905405335).

Almost surely, 2^21220219213 is an apocalyptic number.

It is an amenable number.

21220219213 is a deficient number, since it is larger than the sum of its proper divisors (2023023467).

21220219213 is a wasteful number, since it uses less digits than its factorization.

21220219213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43043087.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 21220219213 in words is "twenty-one billion, two hundred twenty million, two hundred nineteen thousand, two hundred thirteen".