121000010220 has 96 divisors (see below), whose sum is σ = 398588299200. Its totient is φ = 30368627712.

The previous prime is 121000010179. The next prime is 121000010231. The reversal of 121000010220 is 22010000121.

It is a Harshad number since it is a multiple of its sum of digits (9).

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 31 ways as a sum of consecutive naturals, for example, 6581235 + ... + 6599594.

It is an arithmetic number, because the mean of its divisors is an integer number (4151961450).

Almost surely, 2^121000010220 is an apocalyptic number.

121000010220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121000010220 is an abundant number, since it is smaller than the sum of its proper divisors (277588288980).

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

121000010220 is a wasteful number, since it uses less digits than its factorization.

121000010220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13180864 (or 13180856 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 121000010220 its reverse (22010000121), we get a palindrome (143010010341).

The spelling of 121000010220 in words is "one hundred twenty-one billion, ten thousand, two hundred twenty".