11011121001221 has 8 divisors (see below), whose sum is σ = 12013554161664. Its totient is φ = 10008924867520.

The previous prime is 11011121001157. The next prime is 11011121001341. The reversal of 11011121001221 is 12210012111011.

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 11011121001221 - 2⁶ = 11011121001157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11011121001196 and 11011121001205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011121001121) 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, 59159540 + ... + 59345373.

It is an arithmetic number, because the mean of its divisors is an integer number (1501694270208).

Almost surely, 2^{11011121001221} is an apocalyptic number.

11011121001221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11011121001221 is a deficient number, since it is larger than the sum of its proper divisors (1002433160443).

11011121001221 is a wasteful number, since it uses less digits than its factorization.

11011121001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118513371.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 11011121001221 its reverse (12210012111011), we get a palindrome (23221133112232).

The spelling of 11011121001221 in words is "eleven trillion, eleven billion, one hundred twenty-one million, one thousand, two hundred twenty-one".