211021021012 has 24 divisors (see below), whose sum is σ = 395402915880. Its totient is φ = 98188231680.

The previous prime is 211021021009. The next prime is 211021021021. The reversal of 211021021012 is 210120120112.

211021021012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 62213329476 + 148807691536 = 249426^2 + 385756^2 .

It is a junction number, because it is equal to n+sod(n) for n = 211021020983 and 211021021001.

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 7 ways as a sum of consecutive naturals, for example, 17427939 + ... + 17440042.

It is an arithmetic number, because the mean of its divisors is an integer number (16475121495).

Almost surely, 2^211021021012 is an apocalyptic number.

It is an amenable number.

211021021012 is a deficient number, since it is larger than the sum of its proper divisors (184381894868).

211021021012 is a wasteful number, since it uses less digits than its factorization.

211021021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34868091 (or 34868089 counting only the distinct ones).

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

Adding to 211021021012 its reverse (210120120112), we get a palindrome (421141141124).

The spelling of 211021021012 in words is "two hundred eleven billion, twenty-one million, twenty-one thousand, twelve".