1231224221250 has 60 divisors (see below), whose sum is σ = 3333498568686. Its totient is φ = 328326456000.

The previous prime is 1231224221237. The next prime is 1231224221251. The reversal of 1231224221250 is 521224221321.

1231224221250 is a `hidden beast` number, since 1 + 231 + 2 + 2 + 422 + 1 + 2 + 5 + 0 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 66981063249 + 1164243158001 = 258807^2 + 1079001^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1231224221251) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 54709827 + ... + 54732326.

Almost surely, 2^{1231224221250} is an apocalyptic number.

1231224221250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231224221250 is an abundant number, since it is smaller than the sum of its proper divisors (2102274347436).

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

1231224221250 is a wasteful number, since it uses less digits than its factorization.

1231224221250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109442181 (or 109442163 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 1231224221250 its reverse (521224221321), we get a palindrome (1752448442571).

The spelling of 1231224221250 in words is "one trillion, two hundred thirty-one billion, two hundred twenty-four million, two hundred twenty-one thousand, two hundred fifty".