11000021121221 has 8 divisors (see below), whose sum is σ = 12000086760384. Its totient is φ = 9999966101920.

The previous prime is 11000021121209. The next prime is 11000021121281. The reversal of 11000021121221 is 12212112000011.

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 11000021121221 - 2¹⁰ = 11000021120197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11000021121196 and 11000021121205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11000021121281) 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, 406400 + ... + 4707993.

It is an arithmetic number, because the mean of its divisors is an integer number (1500010845048).

Almost surely, 2^{11000021121221} is an apocalyptic number.

11000021121221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11000021121221 is a deficient number, since it is larger than the sum of its proper divisors (1000065639163).

11000021121221 is a wasteful number, since it uses less digits than its factorization.

11000021121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5309931.

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

Adding to 11000021121221 its reverse (12212112000011), we get a palindrome (23212133121232).

The spelling of 11000021121221 in words is "eleven trillion, twenty-one million, one hundred twenty-one thousand, two hundred twenty-one".