121312020212 has 12 divisors (see below), whose sum is σ = 214357162656. Its totient is φ = 60067116600.

The previous prime is 121312020187. The next prime is 121312020217. The reversal of 121312020212 is 212020213121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121312020217) 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, 147222914 + ... + 147223737.

It is an arithmetic number, because the mean of its divisors is an integer number (17863096888).

Almost surely, 2^121312020212 is an apocalyptic number.

It is an amenable number.

121312020212 is a deficient number, since it is larger than the sum of its proper divisors (93045142444).

121312020212 is a wasteful number, since it uses less digits than its factorization.

121312020212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294446758 (or 294446756 counting only the distinct ones).

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

Adding to 121312020212 its reverse (212020213121), we get a palindrome (333332233333).

The spelling of 121312020212 in words is "one hundred twenty-one billion, three hundred twelve million, twenty thousand, two hundred twelve".