211200121211231 has 4 divisors (see below), whose sum is σ = 214352361826392. Its totient is φ = 208047880596072.

The previous prime is 211200121211201. The next prime is 211200121211269. The reversal of 211200121211231 is 132112121002112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211200121211231 - 2³⁰ = 211199047469407 is a prime.

It is a super-2 number, since 2×211200121211231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211200121211201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1576120307480 + ... + 1576120307613.

It is an arithmetic number, because the mean of its divisors is an integer number (53588090456598).

Almost surely, 2^{211200121211231} is an apocalyptic number.

211200121211231 is a deficient number, since it is larger than the sum of its proper divisors (3152240615161).

211200121211231 is an equidigital number, since it uses as much as digits as its factorization.

211200121211231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3152240615160.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 211200121211231 its reverse (132112121002112), we get a palindrome (343312242213343).

The spelling of 211200121211231 in words is "two hundred eleven trillion, two hundred billion, one hundred twenty-one million, two hundred eleven thousand, two hundred thirty-one".