11001022012121 has 8 divisors (see below), whose sum is σ = 11112603238344. Its totient is φ = 10889492947200.

The previous prime is 11001022012093. The next prime is 11001022012163. The reversal of 11001022012121 is 12121022010011.

It can be written as a sum of positive squares in 4 ways, for example, as 7631759854096 + 3369262158025 = 2762564^2 + 1835555^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11001022012121 - 2¹⁰ = 11001022011097 is a prime.

It is a super-2 number, since 2×11001022012121² (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 = 11001022012096 and 11001022012105.

It is not an unprimeable number, because it can be changed into a prime (11001022612121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12616310 + ... + 13460063.

It is an arithmetic number, because the mean of its divisors is an integer number (1389075404793).

Almost surely, 2^{11001022012121} is an apocalyptic number.

It is an amenable number.

11001022012121 is a deficient number, since it is larger than the sum of its proper divisors (111581226223).

11001022012121 is a wasteful number, since it uses less digits than its factorization.

11001022012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26080651.

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

Adding to 11001022012121 its reverse (12121022010011), we get a palindrome (23122044022132).

The spelling of 11001022012121 in words is "eleven trillion, one billion, twenty-two million, twelve thousand, one hundred twenty-one".