11001201021121 has 16 divisors (see below), whose sum is σ = 11980002686400. Its totient is φ = 10062406872000.

The previous prime is 11001201021113. The next prime is 11001201021143. The reversal of 11001201021121 is 12112010210011.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11001201021121 - 2³ = 11001201021113 is a prime.

It is a super-2 number, since 2×11001201021121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11001201021221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14038771 + ... + 14801671.

It is an arithmetic number, because the mean of its divisors is an integer number (748750167900).

Almost surely, 2^{11001201021121} is an apocalyptic number.

It is an amenable number.

11001201021121 is a deficient number, since it is larger than the sum of its proper divisors (978801665279).

11001201021121 is a wasteful number, since it uses less digits than its factorization.

11001201021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789120.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11001201021121 its reverse (12112010210011), we get a palindrome (23113211231132).

The spelling of 11001201021121 in words is "eleven trillion, one billion, two hundred one million, twenty-one thousand, one hundred twenty-one".