1211210112 has 64 divisors (see below), whose sum is σ = 3676896000. Its totient is φ = 346059264.

The previous prime is 1211210089. The next prime is 1211210129. The reversal of 1211210112 is 2110121121.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×1211210112² = 2934059870822105088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222612 + ... + 227987.

It is an arithmetic number, because the mean of its divisors is an integer number (57451500).

Almost surely, 2^1211210112 is an apocalyptic number.

1211210112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211210112 is an abundant number, since it is smaller than the sum of its proper divisors (2465685888).

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

1211210112 is an equidigital number, since it uses as much as digits as its factorization.

1211210112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450623 (or 450611 counting only the distinct ones).

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

The square root of 1211210112 is about 34802.4440521065. Note that the first 3 decimals coincide. The cubic root of 1211210112 is about 1065.9573520339.

Adding to 1211210112 its reverse (2110121121), we get a palindrome (3321331233).

The spelling of 1211210112 in words is "one billion, two hundred eleven million, two hundred ten thousand, one hundred twelve".