1001232211231 has 4 divisors (see below), whose sum is σ = 1144265384272. Its totient is φ = 858199038192.

The previous prime is 1001232211219. The next prime is 1001232211237. The reversal of 1001232211231 is 1321122321001.

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 1001232211231 - 2³⁷ = 863793257759 is a prime.

It is a super-2 number, since 2×1001232211231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001232211199 and 1001232211208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001232211237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71516586510 + ... + 71516586523.

It is an arithmetic number, because the mean of its divisors is an integer number (286066346068).

Almost surely, 2^{1001232211231} is an apocalyptic number.

1001232211231 is a deficient number, since it is larger than the sum of its proper divisors (143033173041).

1001232211231 is an equidigital number, since it uses as much as digits as its factorization.

1001232211231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143033173040.

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

Adding to 1001232211231 its reverse (1321122321001), we get a palindrome (2322354532232).

It can be divided in two parts, 1001 and 232211231, that added together give a palindrome (232212232).

The spelling of 1001232211231 in words is "one trillion, one billion, two hundred thirty-two million, two hundred eleven thousand, two hundred thirty-one".