1211112210 has 256 divisors, whose sum is σ = 3807129600. Its totient is φ = 239232000.

The previous prime is 1211112163. The next prime is 1211112229. The reversal of 1211112210 is 122111121.

It is a super-2 number, since 2×1211112210² = 2933585570422168200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6765901 + ... + 6766079.

It is an arithmetic number, because the mean of its divisors is an integer number (14871600).

Almost surely, 2^1211112210 is an apocalyptic number.

1211112210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211112210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1903564800).

1211112210 is an abundant number, since it is smaller than the sum of its proper divisors (2596017390).

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

1211112210 is a wasteful number, since it uses less digits than its factorization.

1211112210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1211112210 is about 34801.0374845349. The cubic root of 1211112210 is about 1065.9286308490.

Adding to 1211112210 its reverse (122111121), we get a palindrome (1333223331).

It can be divided in two parts, 121111 and 2210, that added together give a palindrome (123321).

The spelling of 1211112210 in words is "one billion, two hundred eleven million, one hundred twelve thousand, two hundred ten".