11201211021 has 64 divisors (see below), whose sum is σ = 20594681856. Its totient is φ = 5225990400.

The previous prime is 11201211017. The next prime is 11201211211. The reversal of 11201211021 is 12011210211.

It is not a de Polignac number, because 11201211021 - 2² = 11201211017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11201210988 and 11201211006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201211421) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 60706 + ... + 161516.

It is an arithmetic number, because the mean of its divisors is an integer number (321791904).

Almost surely, 2^11201211021 is an apocalyptic number.

11201211021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11201211021 is a deficient number, since it is larger than the sum of its proper divisors (9393470835).

11201211021 is a wasteful number, since it uses less digits than its factorization.

11201211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100882.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11201211021 its reverse (12011210211), we get a palindrome (23212421232).

It can be divided in two parts, 11201 and 211021, that added together give a palindrome (222222).

The spelling of 11201211021 in words is "eleven billion, two hundred one million, two hundred eleven thousand, twenty-one".