1210123203220 has 12 divisors (see below), whose sum is σ = 2541258726804. Its totient is φ = 484049281280.

The previous prime is 1210123203089. The next prime is 1210123203227. The reversal of 1210123203220 is 223023210121.

It can be written as a sum of positive squares in 2 ways, for example, as 211778517636 + 998344685584 = 460194^2 + 999172^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210123203227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30253080061 + ... + 30253080100.

It is an arithmetic number, because the mean of its divisors is an integer number (211771560567).

Almost surely, 2^{1210123203220} is an apocalyptic number.

1210123203220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210123203220 is an abundant number, since it is smaller than the sum of its proper divisors (1331135523584).

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

1210123203220 is a wasteful number, since it uses less digits than its factorization.

1210123203220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60506160170 (or 60506160168 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 1210123203220 its reverse (223023210121), we get a palindrome (1433146413341).

The spelling of 1210123203220 in words is "one trillion, two hundred ten billion, one hundred twenty-three million, two hundred three thousand, two hundred twenty".