1130121213231 has 4 divisors (see below), whose sum is σ = 1506828284312. Its totient is φ = 753414142152.

The previous prime is 1130121213211. The next prime is 1130121213233. The reversal of 1130121213231 is 1323121210311.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1130121213231 - 2⁷ = 1130121213103 is a prime.

It is a super-2 number, since 2×1130121213231² (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 = 1130121213198 and 1130121213207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1130121213233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188353535536 + ... + 188353535541.

It is an arithmetic number, because the mean of its divisors is an integer number (376707071078).

Almost surely, 2^{1130121213231} is an apocalyptic number.

1130121213231 is a deficient number, since it is larger than the sum of its proper divisors (376707071081).

1130121213231 is an equidigital number, since it uses as much as digits as its factorization.

1130121213231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376707071080.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1130121213231 its reverse (1323121210311), we get a palindrome (2453242423542).

The spelling of 1130121213231 in words is "one trillion, one hundred thirty billion, one hundred twenty-one million, two hundred thirteen thousand, two hundred thirty-one".