1202221121220 has 144 divisors (see below), whose sum is σ = 4189521143808. Its totient is φ = 273354635520.

The previous prime is 1202221121209. The next prime is 1202221121273. The reversal of 1202221121220 is 221211222021.

It is a happy number.

1202221121220 is a `hidden beast` number, since 1 + 202 + 221 + 1 + 21 + 220 = 666.

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 = 1202221121193 and 1202221121202.

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, 2257099 + ... + 2738418.

It is an arithmetic number, because the mean of its divisors is an integer number (29093896832).

Almost surely, 2^{1202221121220} is an apocalyptic number.

1202221121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1202221121220 is an abundant number, since it is smaller than the sum of its proper divisors (2987300022588).

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

1202221121220 is a wasteful number, since it uses less digits than its factorization.

1202221121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4995730 (or 4995725 counting only the distinct ones).

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

Adding to 1202221121220 its reverse (221211222021), we get a palindrome (1423432343241).

The spelling of 1202221121220 in words is "one trillion, two hundred two billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred twenty".