211221120012 has 24 divisors (see below), whose sum is σ = 563256320256. Its totient is φ = 60348891408.

The previous prime is 211221119999. The next prime is 211221120031. The reversal of 211221120012 is 210021122112.

It is a super-2 number, since 2×211221120012² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211221119973 and 211221120000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1257268488 + ... + 1257268655.

It is an arithmetic number, because the mean of its divisors is an integer number (23469013344).

Almost surely, 2^211221120012 is an apocalyptic number.

It is an amenable number.

211221120012 is an abundant number, since it is smaller than the sum of its proper divisors (352035200244).

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

211221120012 is a wasteful number, since it uses less digits than its factorization.

211221120012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2514537157 (or 2514537155 counting only the distinct ones).

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

Adding to 211221120012 its reverse (210021122112), we get a palindrome (421242242124).

The spelling of 211221120012 in words is "two hundred eleven billion, two hundred twenty-one million, one hundred twenty thousand, twelve".