1231040223228 has 48 divisors (see below), whose sum is σ = 2876248118016. Its totient is φ = 409801213440.

The previous prime is 1231040223227. The next prime is 1231040223337. The reversal of 1231040223228 is 8223220401321.

It is a junction number, because it is equal to n+sod(n) for n = 1231040223195 and 1231040223204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231040223221) 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, 33929425 + ... + 33965687.

It is an arithmetic number, because the mean of its divisors is an integer number (59921835792).

Almost surely, 2^{1231040223228} is an apocalyptic number.

It is an amenable number.

1231040223228 is an abundant number, since it is smaller than the sum of its proper divisors (1645207894788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231040223228 is a wasteful number, since it uses less digits than its factorization.

1231040223228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39954 (or 39952 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 1231040223228 its reverse (8223220401321), we get a palindrome (9454260624549).

The spelling of 1231040223228 in words is "one trillion, two hundred thirty-one billion, forty million, two hundred twenty-three thousand, two hundred twenty-eight".