1021201100120 has 16 divisors (see below), whose sum is σ = 2297702475360. Its totient is φ = 408480440032.

The previous prime is 1021201100119. The next prime is 1021201100203. The reversal of 1021201100120 is 210011021201.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 12765013712 + ... + 12765013791.

It is an arithmetic number, because the mean of its divisors is an integer number (143606404710).

Almost surely, 2^{1021201100120} is an apocalyptic number.

1021201100120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021201100120 is an abundant number, since it is smaller than the sum of its proper divisors (1276501375240).

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

1021201100120 is a wasteful number, since it uses less digits than its factorization.

1021201100120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25530027514 (or 25530027510 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1021201100120 its reverse (210011021201), we get a palindrome (1231212121321).

The spelling of 1021201100120 in words is "one trillion, twenty-one billion, two hundred one million, one hundred thousand, one hundred twenty".