1231121120303 has 32 divisors (see below), whose sum is σ = 1317902745600. Its totient is φ = 1146734565984.

The previous prime is 1231121120297. The next prime is 1231121120363. The reversal of 1231121120303 is 3030211211321.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1231121120303 - 2⁶ = 1231121120239 is a prime.

It is a super-2 number, since 2×1231121120303² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231121120363) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 203589026 + ... + 203595072.

It is an arithmetic number, because the mean of its divisors is an integer number (41184460800).

Almost surely, 2^{1231121120303} is an apocalyptic number.

1231121120303 is a deficient number, since it is larger than the sum of its proper divisors (86781625297).

1231121120303 is a wasteful number, since it uses less digits than its factorization.

1231121120303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6939.

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

Adding to 1231121120303 its reverse (3030211211321), we get a palindrome (4261332331624).

The spelling of 1231121120303 in words is "one trillion, two hundred thirty-one billion, one hundred twenty-one million, one hundred twenty thousand, three hundred three".