121210220312 has 16 divisors (see below), whose sum is σ = 230994888000. Its totient is φ = 59611583520.

The previous prime is 121210220311. The next prime is 121210220323. The reversal of 121210220312 is 213022012121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121210220311) 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, 124190312 + ... + 124191287.

It is an arithmetic number, because the mean of its divisors is an integer number (14437180500).

Almost surely, 2^121210220312 is an apocalyptic number.

It is an amenable number.

121210220312 is a deficient number, since it is larger than the sum of its proper divisors (109784667688).

121210220312 is a wasteful number, since it uses less digits than its factorization.

121210220312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248381666 (or 248381662 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 121210220312 its reverse (213022012121), we get a palindrome (334232232433).

The spelling of 121210220312 in words is "one hundred twenty-one billion, two hundred ten million, two hundred twenty thousand, three hundred twelve".