121000222220 has 24 divisors (see below), whose sum is σ = 254116666608. Its totient is φ = 48397003200.

The previous prime is 121000222219. The next prime is 121000222229. The reversal of 121000222220 is 22222000121.

It is a junction number, because it is equal to n+sod(n) for n = 121000222195 and 121000222204.

It is not an unprimeable number, because it can be changed into a prime (121000222229) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 142955 + ... + 512285.

It is an arithmetic number, because the mean of its divisors is an integer number (10588194442).

Almost surely, 2^121000222220 is an apocalyptic number.

121000222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121000222220 is an abundant number, since it is smaller than the sum of its proper divisors (133116444388).

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

121000222220 is a wasteful number, since it uses less digits than its factorization.

121000222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385721 (or 385719 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 121000222220 its reverse (22222000121), we get a palindrome (143222222341).

The spelling of 121000222220 in words is "one hundred twenty-one billion, two hundred twenty-two thousand, two hundred twenty".