20213113221 has 16 divisors (see below), whose sum is σ = 34223260800. Its totient is φ = 11550350304.

The previous prime is 20213113211. The next prime is 20213113223. The reversal of 20213113221 is 12231131202.

It is not a de Polignac number, because 20213113221 - 2¹⁰ = 20213112197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20213113194 and 20213113203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213113223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53473656 + ... + 53474033.

It is an arithmetic number, because the mean of its divisors is an integer number (2138953800).

Almost surely, 2^20213113221 is an apocalyptic number.

20213113221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20213113221 is a deficient number, since it is larger than the sum of its proper divisors (14010147579).

20213113221 is a wasteful number, since it uses less digits than its factorization.

20213113221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106947705 (or 106947699 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20213113221 its reverse (12231131202), we get a palindrome (32444244423).

The spelling of 20213113221 in words is "twenty billion, two hundred thirteen million, one hundred thirteen thousand, two hundred twenty-one".