2101021100120 has 32 divisors (see below), whose sum is σ = 4748122594800. Its totient is φ = 836706196608.

The previous prime is 2101021100111. The next prime is 2101021100149. The reversal of 2101021100120 is 210011201012.

It is a congruent number.

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, 115685915 + ... + 115704074.

Almost surely, 2^{2101021100120} is an apocalyptic number.

2101021100120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101021100120 is an abundant number, since it is smaller than the sum of its proper divisors (2647101494680).

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

2101021100120 is a wasteful number, since it uses less digits than its factorization.

2101021100120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231390227 (or 231390223 counting only the distinct ones).

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

Adding to 2101021100120 its reverse (210011201012), we get a palindrome (2311032301132).

The spelling of 2101021100120 in words is "two trillion, one hundred one billion, twenty-one million, one hundred thousand, one hundred twenty".