1211231203130 has 16 divisors (see below), whose sum is σ = 2347925101704. Its totient is φ = 447223828800.

The previous prime is 1211231203121. The next prime is 1211231203159. The reversal of 1211231203130 is 313021321121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 856359607609 + 354871595521 = 925397^2 + 595711^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4658581421 + ... + 4658581680.

Almost surely, 2^{1211231203130} is an apocalyptic number.

1211231203130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211231203130 is a deficient number, since it is larger than the sum of its proper divisors (1136693898574).

1211231203130 is a wasteful number, since it uses less digits than its factorization.

1211231203130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9317163121.

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

Adding to 1211231203130 its reverse (313021321121), we get a palindrome (1524252524251).

The spelling of 1211231203130 in words is "one trillion, two hundred eleven billion, two hundred thirty-one million, two hundred three thousand, one hundred thirty".