10011212020 has 12 divisors (see below), whose sum is σ = 21023545284. Its totient is φ = 4004484800.

The previous prime is 10011211997. The next prime is 10011212041. The reversal of 10011212020 is 2021211001.

It can be written as a sum of positive squares in 2 ways, for example, as 2773286244 + 7237925776 = 52662^2 + 85076^2 .

It is a super-2 number, since 2×10011212020² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 10011211988 and 10011212006.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 250280281 + ... + 250280320.

It is an arithmetic number, because the mean of its divisors is an integer number (1751962107).

Almost surely, 2^10011212020 is an apocalyptic number.

10011212020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10011212020 is an abundant number, since it is smaller than the sum of its proper divisors (11012333264).

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

10011212020 is a wasteful number, since it uses less digits than its factorization.

10011212020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500560610 (or 500560608 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 10011212020 its reverse (2021211001), we get a palindrome (12032423021).

The spelling of 10011212020 in words is "ten billion, eleven million, two hundred twelve thousand, twenty".