121021202108 has 12 divisors (see below), whose sum is σ = 220995238800. Its totient is φ = 57879705312.

The previous prime is 121021202089. The next prime is 121021202153. The reversal of 121021202108 is 801202120121.

It is a super-2 number, since 2×121021202108² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121021202108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 657723833 + ... + 657724016.

It is an arithmetic number, because the mean of its divisors is an integer number (18416269900).

Almost surely, 2^121021202108 is an apocalyptic number.

It is an amenable number.

121021202108 is a deficient number, since it is larger than the sum of its proper divisors (99974036692).

121021202108 is a wasteful number, since it uses less digits than its factorization.

121021202108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315447876 (or 1315447874 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 121021202108 its reverse (801202120121), we get a palindrome (922223322229).

The spelling of 121021202108 in words is "one hundred twenty-one billion, twenty-one million, two hundred two thousand, one hundred eight".