11012020020221 has 4 divisors (see below), whose sum is σ = 12013112749344. Its totient is φ = 10010927291100.

The previous prime is 11012020020217. The next prime is 11012020020247. The reversal of 11012020020221 is 12202002021011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11012020020221 - 2² = 11012020020217 is a prime.

It is a super-2 number, since 2×11012020020221² (a number of 27 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 = 11012020020196 and 11012020020205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11012020020721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500546364545 + ... + 500546364566.

It is an arithmetic number, because the mean of its divisors is an integer number (3003278187336).

Almost surely, 2^{11012020020221} is an apocalyptic number.

11012020020221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11012020020221 is a deficient number, since it is larger than the sum of its proper divisors (1001092729123).

11012020020221 is a wasteful number, since it uses less digits than its factorization.

11012020020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001092729122.

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

Adding to 11012020020221 its reverse (12202002021011), we get a palindrome (23214022041232).

The spelling of 11012020020221 in words is "eleven trillion, twelve billion, twenty million, twenty thousand, two hundred twenty-one".