211220321412 has 24 divisors (see below), whose sum is σ = 493112298112. Its totient is φ = 70368933600.

The previous prime is 211220321369. The next prime is 211220321419. The reversal of 211220321412 is 214123022112.

It is a happy number.

It is a super-2 number, since 2×211220321412² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211220321419) 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 7 ways as a sum of consecutive naturals, for example, 4706764 + ... + 4751427.

Almost surely, 2^211220321412 is an apocalyptic number.

It is an amenable number.

211220321412 is an abundant number, since it is smaller than the sum of its proper divisors (281891976700).

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

211220321412 is a wasteful number, since it uses less digits than its factorization.

211220321412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9460059 (or 9460057 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 211220321412 its reverse (214123022112), we get a palindrome (425343343524).

The spelling of 211220321412 in words is "two hundred eleven billion, two hundred twenty million, three hundred twenty-one thousand, four hundred twelve".