11001201022121 has 4 divisors (see below), whose sum is σ = 11010270438852. Its totient is φ = 10992131605392.

The previous prime is 11001201022117. The next prime is 11001201022151. The reversal of 11001201022121 is 12122010210011.

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 4971401552896 + 6029799469225 = 2229664^2 + 2455565^2 .

It is a cyclic number.

It is not a de Polignac number, because 11001201022121 - 2² = 11001201022117 is a prime.

It is a super-2 number, since 2×11001201022121² (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 = 11001201022096 and 11001201022105.

It is not an unprimeable number, because it can be changed into a prime (11001201022151) 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, 4534706546 + ... + 4534708971.

It is an arithmetic number, because the mean of its divisors is an integer number (2752567609713).

Almost surely, 2^{11001201022121} is an apocalyptic number.

It is an amenable number.

11001201022121 is a deficient number, since it is larger than the sum of its proper divisors (9069416731).

11001201022121 is an equidigital number, since it uses as much as digits as its factorization.

11001201022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9069416730.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11001201022121 its reverse (12122010210011), we get a palindrome (23123211232132).

The spelling of 11001201022121 in words is "eleven trillion, one billion, two hundred one million, twenty-two thousand, one hundred twenty-one".