21220011113213 has 32 divisors (see below), whose sum is σ = 24144741384192. Its totient is φ = 18474437635200.

The previous prime is 21220011113209. The next prime is 21220011113237. The reversal of 21220011113213 is 31231111002212.

It is a cyclic number.

It is not a de Polignac number, because 21220011113213 - 2² = 21220011113209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220011113293) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50120456 + ... + 50542062.

It is an arithmetic number, because the mean of its divisors is an integer number (754523168256).

Almost surely, 2^{21220011113213} is an apocalyptic number.

It is an amenable number.

21220011113213 is a deficient number, since it is larger than the sum of its proper divisors (2924730270979).

21220011113213 is a wasteful number, since it uses less digits than its factorization.

21220011113213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423185.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21220011113213 its reverse (31231111002212), we get a palindrome (52451122115425).

The spelling of 21220011113213 in words is "twenty-one trillion, two hundred twenty billion, eleven million, one hundred thirteen thousand, two hundred thirteen".