20102111120 has 80 divisors (see below), whose sum is σ = 57522984960. Its totient is φ = 6361984512.

The previous prime is 20102111111. The next prime is 20102111129. The reversal of 20102111120 is 2111120102.

It is an interprime number because it is at equal distance from previous prime (20102111111) and next prime (20102111129).

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

It is not an unprimeable number, because it can be changed into a prime (20102111129) 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, 1373360 + ... + 1387919.

It is an arithmetic number, because the mean of its divisors is an integer number (719037312).

Almost surely, 2^20102111120 is an apocalyptic number.

20102111120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20102111120 is an abundant number, since it is smaller than the sum of its proper divisors (37420873840).

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

20102111120 is a wasteful number, since it uses less digits than its factorization.

20102111120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2761312 (or 2761306 counting only the distinct ones).

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

Adding to 20102111120 its reverse (2111120102), we get a palindrome (22213231222).

The spelling of 20102111120 in words is "twenty billion, one hundred two million, one hundred eleven thousand, one hundred twenty".