211231203121 has 8 divisors (see below), whose sum is σ = 211431528000. Its totient is φ = 211030970832.

The previous prime is 211231203109. The next prime is 211231203133. The reversal of 211231203121 is 121302132112.

It is an interprime number because it is at equal distance from previous prime (211231203109) and next prime (211231203133).

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 211231203121 - 2¹³ = 211231194929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211231203191) 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, 5056506 + ... + 5098108.

It is an arithmetic number, because the mean of its divisors is an integer number (26428941000).

Almost surely, 2^211231203121 is an apocalyptic number.

It is an amenable number.

211231203121 is a deficient number, since it is larger than the sum of its proper divisors (200324879).

211231203121 is a wasteful number, since it uses less digits than its factorization.

211231203121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46295.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 211231203121 its reverse (121302132112), we get a palindrome (332533335233).

The spelling of 211231203121 in words is "two hundred eleven billion, two hundred thirty-one million, two hundred three thousand, one hundred twenty-one".