11011221210121 has 64 divisors (see below), whose sum is σ = 13242354564096. Its totient is φ = 9041591603200.

The previous prime is 11011221210083. The next prime is 11011221210127. The reversal of 11011221210121 is 12101212211011.

11011221210121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11011221210121 - 2⁹ = 11011221209609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11011221210095 and 11011221210104.

It is not an unprimeable number, because it can be changed into a prime (11011221210127) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 919050951 + ... + 919062931.

It is an arithmetic number, because the mean of its divisors is an integer number (206911790064).

Almost surely, 2^{11011221210121} is an apocalyptic number.

11011221210121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11011221210121 is a deficient number, since it is larger than the sum of its proper divisors (2231133353975).

11011221210121 is a wasteful number, since it uses less digits than its factorization.

11011221210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14082.

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

Adding to 11011221210121 its reverse (12101212211011), we get a palindrome (23112433421132).

The spelling of 11011221210121 in words is "eleven trillion, eleven billion, two hundred twenty-one million, two hundred ten thousand, one hundred twenty-one".