211215441252 has 12 divisors (see below), whose sum is σ = 492836029616. Its totient is φ = 70405147080.

The previous prime is 211215441251. The next prime is 211215441271. The reversal of 211215441252 is 252144512112.

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

It is a super-2 number, since 2×211215441252² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211215441251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8800643374 + ... + 8800643397.

Almost surely, 2^211215441252 is an apocalyptic number.

It is an amenable number.

211215441252 is an abundant number, since it is smaller than the sum of its proper divisors (281620588364).

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

211215441252 is a wasteful number, since it uses less digits than its factorization.

211215441252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17601286778 (or 17601286776 counting only the distinct ones).

The product of its digits is 6400, while the sum is 30.

Adding to 211215441252 its reverse (252144512112), we get a palindrome (463359953364).

The spelling of 211215441252 in words is "two hundred eleven billion, two hundred fifteen million, four hundred forty-one thousand, two hundred fifty-two".