1211203133020 has 24 divisors (see below), whose sum is σ = 2578369412304. Its totient is φ = 477844523136.

The previous prime is 1211203133011. The next prime is 1211203133039. The reversal of 1211203133020 is 203313021121.

It is a congruent 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, 414794134 + ... + 414797053.

It is an arithmetic number, because the mean of its divisors is an integer number (107432058846).

Almost surely, 2^{1211203133020} is an apocalyptic number.

1211203133020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211203133020 is an abundant number, since it is smaller than the sum of its proper divisors (1367166279284).

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

1211203133020 is a wasteful number, since it uses less digits than its factorization.

1211203133020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829591269 (or 829591267 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1211203133020 its reverse (203313021121), we get a palindrome (1414516154141).

The spelling of 1211203133020 in words is "one trillion, two hundred eleven billion, two hundred three million, one hundred thirty-three thousand, twenty".