202120111120 has 20 divisors (see below), whose sum is σ = 469929258540. Its totient is φ = 80848044416.

The previous prime is 202120111111. The next prime is 202120111121. The reversal of 202120111120 is 21111021202.

It can be written as a sum of positive squares in 2 ways, for example, as 133660435216 + 68459675904 = 365596^2 + 261648^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×202120111120² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 202120111120.

It is not an unprimeable number, because it can be changed into a prime (202120111121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1263250615 + ... + 1263250774.

It is an arithmetic number, because the mean of its divisors is an integer number (23496462927).

Almost surely, 2^202120111120 is an apocalyptic number.

202120111120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202120111120 is an abundant number, since it is smaller than the sum of its proper divisors (267809147420).

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

202120111120 is a wasteful number, since it uses less digits than its factorization.

202120111120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2526501402 (or 2526501396 counting only the distinct ones).

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

Adding to 202120111120 its reverse (21111021202), we get a palindrome (223231132322).

The spelling of 202120111120 in words is "two hundred two billion, one hundred twenty million, one hundred eleven thousand, one hundred twenty".