121002221210220 has 144 divisors (see below), whose sum is σ = 419838815305728. Its totient is φ = 27633620995200.

The previous prime is 121002221210209. The next prime is 121002221210231. The reversal of 121002221210220 is 22012122200121.

It is a happy number.

121002221210220 is a `hidden beast` number, since 1 + 2 + 10 + 0 + 2 + 221 + 210 + 220 = 666.

It is an interprime number because it is at equal distance from previous prime (121002221210209) and next prime (121002221210231).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 121002221210193 and 121002221210202.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40267164 + ... + 43167683.

It is an arithmetic number, because the mean of its divisors is an integer number (2915547328512).

Almost surely, 2^{121002221210220} is an apocalyptic number.

121002221210220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121002221210220 is an abundant number, since it is smaller than the sum of its proper divisors (298836594095508).

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

121002221210220 is a wasteful number, since it uses less digits than its factorization.

121002221210220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83436020 (or 83436015 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121002221210220 its reverse (22012122200121), we get a palindrome (143014343410341).

The spelling of 121002221210220 in words is "one hundred twenty-one trillion, two billion, two hundred twenty-one million, two hundred ten thousand, two hundred twenty".