20201211111120 has 80 divisors (see below), whose sum is σ = 67440966335232. Its totient is φ = 4972605811200.

The previous prime is 20201211111119. The next prime is 20201211111121. The reversal of 20201211111120 is 2111111210202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20201211111119) and next prime (20201211111121).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20201211111120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201211111121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3237370456 + ... + 3237376695.

Almost surely, 2^{20201211111120} is an apocalyptic number.

20201211111120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20201211111120 is an abundant number, since it is smaller than the sum of its proper divisors (47239755224112).

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

20201211111120 is a wasteful number, since it uses less digits than its factorization.

20201211111120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6474747180 (or 6474747174 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20201211111120 its reverse (2111111210202), we get a palindrome (22312322321322).

The spelling of 20201211111120 in words is "twenty trillion, two hundred one billion, two hundred eleven million, one hundred eleven thousand, one hundred twenty".