121000022120 has 128 divisors (see below), whose sum is σ = 302444928000. Its totient is φ = 43360358400.

The previous prime is 121000022107. The next prime is 121000022183. The reversal of 121000022120 is 21220000121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1238831 + ... + 1332929.

It is an arithmetic number, because the mean of its divisors is an integer number (2362851000).

Almost surely, 2^121000022120 is an apocalyptic number.

121000022120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121000022120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151222464000).

121000022120 is an abundant number, since it is smaller than the sum of its proper divisors (181444905880).

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

121000022120 is a wasteful number, since it uses less digits than its factorization.

121000022120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94219 (or 94215 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 121000022120 its reverse (21220000121), we get a palindrome (142220022241).

The spelling of 121000022120 in words is "one hundred twenty-one billion, twenty-two thousand, one hundred twenty".