20021101210120 has 64 divisors (see below), whose sum is σ = 46501650800640. Its totient is φ = 7749932256000.

The previous prime is 20021101210091. The next prime is 20021101210169. The reversal of 20021101210120 is 2101210112002.

It is a self number, because there is not a number n which added to its sum of digits gives 20021101210120.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65693209 + ... + 65997271.

It is an arithmetic number, because the mean of its divisors is an integer number (726588293760).

Almost surely, 2^{20021101210120} is an apocalyptic number.

20021101210120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021101210120 is an abundant number, since it is smaller than the sum of its proper divisors (26480549590520).

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

20021101210120 is a wasteful number, since it uses less digits than its factorization.

20021101210120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357206 (or 357202 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20021101210120 its reverse (2101210112002), we get a palindrome (22122311322122).

The spelling of 20021101210120 in words is "twenty trillion, twenty-one billion, one hundred one million, two hundred ten thousand, one hundred twenty".