11201021122021 has 4 divisors (see below), whose sum is σ = 11859904717452. Its totient is φ = 10542137526592.

The previous prime is 11201021122019. The next prime is 11201021122069. The reversal of 11201021122021 is 12022112010211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9797613652996 + 1403407469025 = 3130114^2 + 1184655^2 .

It is a cyclic number.

It is not a de Polignac number, because 11201021122021 - 2¹ = 11201021122019 is a prime.

It is a super-2 number, since 2×11201021122021² (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 = 11201021121986 and 11201021122004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201021122001) 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, 329441797690 + ... + 329441797723.

It is an arithmetic number, because the mean of its divisors is an integer number (2964976179363).

Almost surely, 2^{11201021122021} is an apocalyptic number.

It is an amenable number.

11201021122021 is a deficient number, since it is larger than the sum of its proper divisors (658883595431).

11201021122021 is an equidigital number, since it uses as much as digits as its factorization.

11201021122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658883595430.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11201021122021 its reverse (12022112010211), we get a palindrome (23223133132232).

The spelling of 11201021122021 in words is "eleven trillion, two hundred one billion, twenty-one million, one hundred twenty-two thousand, twenty-one".