1202221221220 has 24 divisors (see below), whose sum is σ = 2611721964600. Its totient is φ = 464306126592.

The previous prime is 1202221221209. The next prime is 1202221221281. The reversal of 1202221221220 is 221221222021.

It can be written as a sum of positive squares in 4 ways, for example, as 295448776704 + 906772444516 = 543552^2 + 952246^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1036397025 + ... + 1036398184.

It is an arithmetic number, because the mean of its divisors is an integer number (108821748525).

Almost surely, 2^{1202221221220} is an apocalyptic number.

1202221221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1202221221220 is an abundant number, since it is smaller than the sum of its proper divisors (1409500743380).

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

1202221221220 is a wasteful number, since it uses less digits than its factorization.

1202221221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2072795247 (or 2072795245 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 1202221221220 its reverse (221221222021), we get a palindrome (1423442443241).

The spelling of 1202221221220 in words is "one trillion, two hundred two billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred twenty".