1201221022220 has 24 divisors (see below), whose sum is σ = 2526936032544. Its totient is φ = 479655668736.

The previous prime is 1201221022213. The next prime is 1201221022249. The reversal of 1201221022220 is 222201221021.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52034432 + ... + 52057511.

It is an arithmetic number, because the mean of its divisors is an integer number (105289001356).

Almost surely, 2^{1201221022220} is an apocalyptic number.

1201221022220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201221022220 is an abundant number, since it is smaller than the sum of its proper divisors (1325715010324).

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

1201221022220 is a wasteful number, since it uses less digits than its factorization.

1201221022220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104092529 (or 104092527 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1201221022220 its reverse (222201221021), we get a palindrome (1423422243241).

The spelling of 1201221022220 in words is "one trillion, two hundred one billion, two hundred twenty-one million, twenty-two thousand, two hundred twenty".