11212020221 has 8 divisors (see below), whose sum is σ = 11248243200. Its totient is φ = 11175856848.

The previous prime is 11212020191. The next prime is 11212020229. The reversal of 11212020221 is 12202021211.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11212020221 is a prime.

It is a super-2 number, since 2×11212020221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11212020196 and 11212020205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212020229) 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, 378455 + ... + 407003.

It is an arithmetic number, because the mean of its divisors is an integer number (1406030400).

Almost surely, 2^11212020221 is an apocalyptic number.

It is an amenable number.

11212020221 is a deficient number, since it is larger than the sum of its proper divisors (36222979).

11212020221 is an equidigital number, since it uses as much as digits as its factorization.

11212020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29803.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 11212020221 its reverse (12202021211), we get a palindrome (23414041432).

The spelling of 11212020221 in words is "eleven billion, two hundred twelve million, twenty thousand, two hundred twenty-one".