1211041212 has 24 divisors (see below), whose sum is σ = 2831826816. Its totient is φ = 402814128.

The previous prime is 1211041193. The next prime is 1211041213. The reversal of 1211041212 is 2121401121.

It is a junction number, because it is equal to n+sod(n) for n = 1211041191 and 1211041200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211041213) 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, 102448 + ... + 113655.

It is an arithmetic number, because the mean of its divisors is an integer number (117992784).

Almost surely, 2^1211041212 is an apocalyptic number.

1211041212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211041212 is an abundant number, since it is smaller than the sum of its proper divisors (1620785604).

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

1211041212 is a wasteful number, since it uses less digits than its factorization.

1211041212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216577 (or 216575 counting only the distinct ones).

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

The square root of 1211041212 is about 34800.0174137887. The cubic root of 1211041212 is about 1065.9078014331.

Adding to 1211041212 its reverse (2121401121), we get a palindrome (3332442333).

The spelling of 1211041212 in words is "one billion, two hundred eleven million, forty-one thousand, two hundred twelve".