211212211200 has 132 divisors (see below), whose sum is σ = 698067612480. Its totient is φ = 56323235840.

The previous prime is 211212211187. The next prime is 211212211201. The reversal of 211212211200 is 2112212112.

It is a super-2 number, since 2×211212211200² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 211212211200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211212211201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1298280 + ... + 1451879.

Almost surely, 2^211212211200 is an apocalyptic number.

211212211200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211212211200 is an abundant number, since it is smaller than the sum of its proper divisors (486855401280).

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

211212211200 is a wasteful number, since it uses less digits than its factorization.

211212211200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2750192 (or 2750169 counting only the distinct ones).

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

Adding to 211212211200 its reverse (2112212112), we get a palindrome (213324423312).

The spelling of 211212211200 in words is "two hundred eleven billion, two hundred twelve million, two hundred eleven thousand, two hundred".