121102212120 has 64 divisors (see below), whose sum is σ = 373125748320. Its totient is φ = 31421113344.

The previous prime is 121102212073. The next prime is 121102212139. The reversal of 121102212120 is 21212201121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121102212120.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13633197 + ... + 13642076.

Almost surely, 2^121102212120 is an apocalyptic number.

121102212120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121102212120 is an abundant number, since it is smaller than the sum of its proper divisors (252023536200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121102212120 is a wasteful number, since it uses less digits than its factorization.

121102212120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27275324 (or 27275320 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121102212120 its reverse (21212201121), we get a palindrome (142314413241).

The spelling of 121102212120 in words is "one hundred twenty-one billion, one hundred two million, two hundred twelve thousand, one hundred twenty".