121222200020220 has 180 divisors, whose sum is σ = 411780895633800. Its totient is φ = 29839310706816.

The previous prime is 121222200020213. The next prime is 121222200020263. The reversal of 121222200020220 is 22020002222121.

121222200020220 is a `hidden beast` number, since 1 + 2 + 1 + 222 + 200 + 0 + 20 + 220 = 666.

It is a tau number, because it is divible by the number of its divisors (180).

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 = 121222200020193 and 121222200020202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 221112370 + ... + 221659929.

It is an arithmetic number, because the mean of its divisors is an integer number (2287671642410).

Almost surely, 2^{121222200020220} is an apocalyptic number.

121222200020220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121222200020220 is an abundant number, since it is smaller than the sum of its proper divisors (290558695613580).

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

121222200020220 is a wasteful number, since it uses less digits than its factorization.

121222200020220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442772346 (or 442772322 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 121222200020220 its reverse (22020002222121), we get a palindrome (143242202242341).

The spelling of 121222200020220 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, two hundred million, twenty thousand, two hundred twenty".