211330121231 has 8 divisors (see below), whose sum is σ = 211997410560. Its totient is φ = 210663329688.

The previous prime is 211330121227. The next prime is 211330121279. The reversal of 211330121231 is 132121033112.

It is a happy number.

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 211330121231 - 2² = 211330121227 is a prime.

It is a super-2 number, since 2×211330121231² (a number of 23 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 (211330121201) 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, 735320 + ... + 981506.

It is an arithmetic number, because the mean of its divisors is an integer number (26499676320).

Almost surely, 2^211330121231 is an apocalyptic number.

211330121231 is a deficient number, since it is larger than the sum of its proper divisors (667289329).

211330121231 is a wasteful number, since it uses less digits than its factorization.

211330121231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248893.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 211330121231 its reverse (132121033112), we get a palindrome (343451154343).

The spelling of 211330121231 in words is "two hundred eleven billion, three hundred thirty million, one hundred twenty-one thousand, two hundred thirty-one".