11001021210121 has 16 divisors (see below), whose sum is σ = 11840049579600. Its totient is φ = 10184521678848.

The previous prime is 11001021210119. The next prime is 11001021210133. The reversal of 11001021210121 is 12101212010011.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 471392096400 + 10529629113721 = 686580^2 + 3244939^2 .

It is a cyclic number.

It is not a de Polignac number, because 11001021210121 - 2¹ = 11001021210119 is a prime.

It is a super-2 number, since 2×11001021210121² (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 (11001021210721) 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, 18544776 + ... + 19128793.

It is an arithmetic number, because the mean of its divisors is an integer number (740003098725).

Almost surely, 2^{11001021210121} is an apocalyptic number.

It is an amenable number.

11001021210121 is a deficient number, since it is larger than the sum of its proper divisors (839028369479).

11001021210121 is a wasteful number, since it uses less digits than its factorization.

11001021210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37673868.

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

Adding to 11001021210121 its reverse (12101212010011), we get a palindrome (23102233220132).

The spelling of 11001021210121 in words is "eleven trillion, one billion, twenty-one million, two hundred ten thousand, one hundred twenty-one".