211021121322012 has 24 divisors (see below), whose sum is σ = 492383234487312. Its totient is φ = 70340285478400.

The previous prime is 211021121321951. The next prime is 211021121322019. The reversal of 211021121322012 is 210223121120112.

It is a self number, because there is not a number n which added to its sum of digits gives 211021121322012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211021121322019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 690939 + ... + 20555282.

It is an arithmetic number, because the mean of its divisors is an integer number (20515968103638).

Almost surely, 2^{211021121322012} is an apocalyptic number.

It is an amenable number.

211021121322012 is an abundant number, since it is smaller than the sum of its proper divisors (281362113165300).

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

211021121322012 is a wasteful number, since it uses less digits than its factorization.

211021121322012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22073909 (or 22073907 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 211021121322012 its reverse (210223121120112), we get a palindrome (421244242442124).

The spelling of 211021121322012 in words is "two hundred eleven trillion, twenty-one billion, one hundred twenty-one million, three hundred twenty-two thousand, twelve".