121210120212028 has 12 divisors (see below), whose sum is σ = 212117792285952. Its totient is φ = 60605036701760.

The previous prime is 121210120212001. The next prime is 121210120212029. The reversal of 121210120212028 is 820212021012121.

It is a junction number, because it is equal to n+sod(n) for n = 121210120211993 and 121210120212011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121210120212029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11555076 + ... + 19389172.

It is an arithmetic number, because the mean of its divisors is an integer number (17676482690496).

Almost surely, 2^{121210120212028} is an apocalyptic number.

It is an amenable number.

121210120212028 is a deficient number, since it is larger than the sum of its proper divisors (90907672073924).

121210120212028 is a wasteful number, since it uses less digits than its factorization.

121210120212028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11702132 (or 11702130 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 25.

Adding to 121210120212028 its reverse (820212021012121), we get a palindrome (941422141224149).

The spelling of 121210120212028 in words is "one hundred twenty-one trillion, two hundred ten billion, one hundred twenty million, two hundred twelve thousand, twenty-eight".