202111011020 has 48 divisors (see below), whose sum is σ = 429246312768. Its totient is φ = 79932775680.

The previous prime is 202111011007. The next prime is 202111011029. The reversal of 202111011020 is 20110111202.

202111011020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×202111011020² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 202111010992 and 202111011010.

It is not an unprimeable number, because it can be changed into a prime (202111011029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 464897 + ... + 787623.

It is an arithmetic number, because the mean of its divisors is an integer number (8942631516).

Almost surely, 2^202111011020 is an apocalyptic number.

202111011020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202111011020 is an abundant number, since it is smaller than the sum of its proper divisors (227135301748).

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

202111011020 is a wasteful number, since it uses less digits than its factorization.

202111011020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323090 (or 323088 counting only the distinct ones).

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

Adding to 202111011020 its reverse (20110111202), we get a palindrome (222221122222).

The spelling of 202111011020 in words is "two hundred two billion, one hundred eleven million, eleven thousand, twenty".