11212111210 has 16 divisors (see below), whose sum is σ = 20194857000. Its totient is φ = 4481942976.

The previous prime is 11212111193. The next prime is 11212111213. The reversal of 11212111210 is 1211121211.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8565317401 + 2646793809 = 92549^2 + 51447^2 .

It is a super-2 number, since 2×11212111210² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11212111213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346425 + ... + 377404.

Almost surely, 2^11212111210 is an apocalyptic number.

11212111210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11212111210 is a deficient number, since it is larger than the sum of its proper divisors (8982745790).

11212111210 is a wasteful number, since it uses less digits than its factorization.

11212111210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725385.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11212111210 its reverse (1211121211), we get a palindrome (12423232421).

The spelling of 11212111210 in words is "eleven billion, two hundred twelve million, one hundred eleven thousand, two hundred ten".