121012012220 has 48 divisors (see below), whose sum is σ = 293535029088. Its totient is φ = 41415874560.

The previous prime is 121012012171. The next prime is 121012012241. The reversal of 121012012220 is 22210210121.

It is a junction number, because it is equal to n+sod(n) for n = 121012012195 and 121012012204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16174337 + ... + 16181816.

It is an arithmetic number, because the mean of its divisors is an integer number (6115313106).

Almost surely, 2^121012012220 is an apocalyptic number.

121012012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121012012220 is an abundant number, since it is smaller than the sum of its proper divisors (172523016868).

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

121012012220 is a wasteful number, since it uses less digits than its factorization.

121012012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32356190 (or 32356188 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121012012220 its reverse (22210210121), we get a palindrome (143222222341).

The spelling of 121012012220 in words is "one hundred twenty-one billion, twelve million, twelve thousand, two hundred twenty".