211001111001231 has 16 divisors (see below), whose sum is σ = 289493042760288. Its totient is φ = 136602887616000.

The previous prime is 211001111001223. The next prime is 211001111001259. The reversal of 211001111001231 is 132100111100112.

It is not a de Polignac number, because 211001111001231 - 2³ = 211001111001223 is a prime.

It is a super-2 number, since 2×211001111001231² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211001111001231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211001111001221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1824232870 + ... + 1824348531.

It is an arithmetic number, because the mean of its divisors is an integer number (18093315172518).

Almost surely, 2^{211001111001231} is an apocalyptic number.

211001111001231 is a deficient number, since it is larger than the sum of its proper divisors (78491931759057).

211001111001231 is a wasteful number, since it uses less digits than its factorization.

211001111001231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3648581962.

The product of its (nonzero) digits is 12, while the sum is 15.

Adding to 211001111001231 its reverse (132100111100112), we get a palindrome (343101222101343).

The spelling of 211001111001231 in words is "two hundred eleven trillion, one billion, one hundred eleven million, one thousand, two hundred thirty-one".