1221200210113 has 4 divisors (see below), whose sum is σ = 1315138687828. Its totient is φ = 1127261732400.

The previous prime is 1221200210077. The next prime is 1221200210183. The reversal of 1221200210113 is 3110120021221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 171542587329 + 1049657622784 = 414177^2 + 1024528^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221200210113 - 2³³ = 1212610275521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221200210183) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 46969238838 + ... + 46969238863.

It is an arithmetic number, because the mean of its divisors is an integer number (328784671957).

Almost surely, 2^{1221200210113} is an apocalyptic number.

1221200210113 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1221200210113 is a deficient number, since it is larger than the sum of its proper divisors (93938477715).

1221200210113 is an equidigital number, since it uses as much as digits as its factorization.

1221200210113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93938477714.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1221200210113 its reverse (3110120021221), we get a palindrome (4331320231334).

The spelling of 1221200210113 in words is "one trillion, two hundred twenty-one billion, two hundred million, two hundred ten thousand, one hundred thirteen".