21102220220213 has 8 divisors (see below), whose sum is σ = 23297960550816. Its totient is φ = 18952706002000.

The previous prime is 21102220220201. The next prime is 21102220220219. The reversal of 21102220220213 is 31202202220112.

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 21102220220213 - 2⁴ = 21102220220197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102220220219) 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, 11556527138 + ... + 11556528963.

It is an arithmetic number, because the mean of its divisors is an integer number (2912245068852).

Almost surely, 2^{21102220220213} is an apocalyptic number.

It is an amenable number.

21102220220213 is a deficient number, since it is larger than the sum of its proper divisors (2195740330603).

21102220220213 is a wasteful number, since it uses less digits than its factorization.

21102220220213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23113056195.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21102220220213 its reverse (31202202220112), we get a palindrome (52304422440325).

The spelling of 21102220220213 in words is "twenty-one trillion, one hundred two billion, two hundred twenty million, two hundred twenty thousand, two hundred thirteen".