1121001213231 has 12 divisors (see below), whose sum is σ = 1679195233352. Its totient is φ = 747334141992.

The previous prime is 1121001213193. The next prime is 1121001213281. The reversal of 1121001213231 is 1323121001211.

1121001213231 is a `hidden beast` number, since 11 + 210 + 0 + 1 + 213 + 231 = 666.

It is not a de Polignac number, because 1121001213231 - 2⁷ = 1121001213103 is a prime.

It is a super-2 number, since 2×1121001213231² (a number of 25 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 (1121001213281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2306586616 + ... + 2306587101.

Almost surely, 2^{1121001213231} is an apocalyptic number.

1121001213231 is a deficient number, since it is larger than the sum of its proper divisors (558194020121).

1121001213231 is an frugal number, since it uses more digits than its factorization.

1121001213231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4613173732 (or 4613173720 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1121001213231 its reverse (1323121001211), we get a palindrome (2444122214442).

The spelling of 1121001213231 in words is "one trillion, one hundred twenty-one billion, one million, two hundred thirteen thousand, two hundred thirty-one".