1021202122120 has 64 divisors (see below), whose sum is σ = 2390675958000. Its totient is φ = 392115483648.

The previous prime is 1021202122103. The next prime is 1021202122121. The reversal of 1021202122120 is 212212021201.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 343632784804 + 677569337316 = 586202^2 + 823146^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1021202122094 and 1021202122103.

It is not an unprimeable number, because it can be changed into a prime (1021202122121) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2343675 + ... + 2745034.

Almost surely, 2^{1021202122120} is an apocalyptic number.

1021202122120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021202122120 is an abundant number, since it is smaller than the sum of its proper divisors (1369473835880).

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

1021202122120 is a wasteful number, since it uses less digits than its factorization.

1021202122120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5088922 (or 5088918 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1021202122120 its reverse (212212021201), we get a palindrome (1233414143321).

The spelling of 1021202122120 in words is "one trillion, twenty-one billion, two hundred two million, one hundred twenty-two thousand, one hundred twenty".