11011121021121 has 8 divisors (see below), whose sum is σ = 15810840440640. Its totient is φ = 6776074474512.

The previous prime is 11011121021111. The next prime is 11011121021143. The reversal of 11011121021121 is 12112012111011.

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

It is not a de Polignac number, because 11011121021121 - 2¹⁸ = 11011120758977 is a prime.

It is a super-2 number, since 2×11011121021121² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11011121021121.

It is not an unprimeable number, because it can be changed into a prime (11011121021111) 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, 141168218181 + ... + 141168218258.

It is an arithmetic number, because the mean of its divisors is an integer number (1976355055080).

Almost surely, 2^{11011121021121} is an apocalyptic number.

It is an amenable number.

11011121021121 is a deficient number, since it is larger than the sum of its proper divisors (4799719419519).

11011121021121 is a wasteful number, since it uses less digits than its factorization.

11011121021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282336436455.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 11011121021121 its reverse (12112012111011), we get a palindrome (23123133132132).

The spelling of 11011121021121 in words is "eleven trillion, eleven billion, one hundred twenty-one million, twenty-one thousand, one hundred twenty-one".