10211211021 has 32 divisors (see below), whose sum is σ = 15645127680.
Its totient is φ = 5858870400.
The previous prime is 10211211001. The next prime is 10211211029. The reversal of 10211211021 is 12011211201.
It is not a de Polignac number, because 10211211021 - 26 = 10211210957 is a prime.
It is a Curzon number.
It is a junction number, because it is equal to n+sod(n) for n = 10211210988 and 10211211006.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (10211211029) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1074336 + ... + 1083798.
It is an arithmetic number, because the mean of its divisors is an integer number (488910240).
Almost surely, 210211211021 is an apocalyptic number.
10211211021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.
It is an amenable number.
10211211021 is a deficient number, since it is larger than the sum of its proper divisors (5433916659).
10211211021 is a wasteful number, since it uses less digits than its factorization.
10211211021 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 11217.
The product of its (nonzero) digits is 8, while the sum is 12.
Adding to 10211211021 its reverse (12011211201), we get a palindrome (22222422222).
The spelling of 10211211021 in words is "ten billion, two hundred eleven million, two hundred eleven thousand, twenty-one".