211220211012 has 12 divisors (see below), whose sum is σ = 492847159056. Its totient is φ = 70406737000.

The previous prime is 211220211011. The next prime is 211220211031. The reversal of 211220211012 is 210112022112.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×211220211012² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211220210982 and 211220211000.

It is not an unprimeable number, because it can be changed into a prime (211220211011) 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 3 ways as a sum of consecutive naturals, for example, 8800842114 + ... + 8800842137.

It is an arithmetic number, because the mean of its divisors is an integer number (41070596588).

Almost surely, 2^211220211012 is an apocalyptic number.

It is an amenable number.

211220211012 is an abundant number, since it is smaller than the sum of its proper divisors (281626948044).

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

211220211012 is a wasteful number, since it uses less digits than its factorization.

211220211012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17601684258 (or 17601684256 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 211220211012 its reverse (210112022112), we get a palindrome (421332233124).

The spelling of 211220211012 in words is "two hundred eleven billion, two hundred twenty million, two hundred eleven thousand, twelve".