11211200121 has 8 divisors (see below), whose sum is σ = 16307200224. Its totient is φ = 6794666720.

The previous prime is 11211200101. The next prime is 11211200159. The reversal of 11211200121 is 12100211211.

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 11211200121 - 2⁹ = 11211199609 is a prime.

It is a super-2 number, since 2×11211200121² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11211200097 and 11211200106.

It is not an unprimeable number, because it can be changed into a prime (11211200101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169866636 + ... + 169866701.

It is an arithmetic number, because the mean of its divisors is an integer number (2038400028).

Almost surely, 2^11211200121 is an apocalyptic number.

11211200121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11211200121 is a deficient number, since it is larger than the sum of its proper divisors (5096000103).

11211200121 is a wasteful number, since it uses less digits than its factorization.

11211200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339733351.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11211200121 its reverse (12100211211), we get a palindrome (23311411332).

The spelling of 11211200121 in words is "eleven billion, two hundred eleven million, two hundred thousand, one hundred twenty-one".