1211110221132 has 96 divisors (see below), whose sum is σ = 3592149872640. Its totient is φ = 345677103360.

The previous prime is 1211110221107. The next prime is 1211110221229. The reversal of 1211110221132 is 2311220111121.

It is a happy number.

It is a super-2 number, since 2×1211110221132² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81244 + ... + 1558467.

It is an arithmetic number, because the mean of its divisors is an integer number (37418227840).

Almost surely, 2^{1211110221132} is an apocalyptic number.

1211110221132 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 1211110221132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1796074936320).

1211110221132 is an abundant number, since it is smaller than the sum of its proper divisors (2381039651508).

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

1211110221132 is a wasteful number, since it uses less digits than its factorization.

1211110221132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640708 (or 1640700 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 1211110221132 its reverse (2311220111121), we get a palindrome (3522330332253).

The spelling of 1211110221132 in words is "one trillion, two hundred eleven billion, one hundred ten million, two hundred twenty-one thousand, one hundred thirty-two".