1211244331212 has 96 divisors (see below), whose sum is σ = 3228400035840. Its totient is φ = 392438312640.

The previous prime is 1211244331181. The next prime is 1211244331247. The reversal of 1211244331212 is 2121334421121.

1211244331212 is a `hidden beast` number, since 1 + 2 + 1 + 1 + 2 + 443 + 3 + 1 + 212 = 666.

It is a super-2 number, since 2×1211244331212² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3807103 + ... + 4112969.

It is an arithmetic number, because the mean of its divisors is an integer number (33629167040).

Almost surely, 2^{1211244331212} is an apocalyptic number.

1211244331212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211244331212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1614200017920).

1211244331212 is an abundant number, since it is smaller than the sum of its proper divisors (2017155704628).

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

1211244331212 is a wasteful number, since it uses less digits than its factorization.

1211244331212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306908 (or 306900 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

Adding to 1211244331212 its reverse (2121334421121), we get a palindrome (3332578752333).

The spelling of 1211244331212 in words is "one trillion, two hundred eleven billion, two hundred forty-four million, three hundred thirty-one thousand, two hundred twelve".