10011211020 has 72 divisors (see below), whose sum is σ = 30820621104. Its totient is φ = 2629807488.

The previous prime is 10011211003. The next prime is 10011211033. The reversal of 10011211020 is 2011211001.

It is a happy number.

10011211020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 10011210993 and 10011211011.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 402999 + ... + 427118.

It is an arithmetic number, because the mean of its divisors is an integer number (428064182).

Almost surely, 2^10011211020 is an apocalyptic number.

10011211020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10011211020 is an abundant number, since it is smaller than the sum of its proper divisors (20809410084).

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

10011211020 is a wasteful number, since it uses less digits than its factorization.

10011211020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830199 (or 830194 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 10011211020 its reverse (2011211001), we get a palindrome (12022422021).

The spelling of 10011211020 in words is "ten billion, eleven million, two hundred eleven thousand, twenty".