1221122132 has 12 divisors (see below), whose sum is σ = 2146548096. Its totient is φ = 607822680.

The previous prime is 1221122099. The next prime is 1221122159. The reversal of 1221122132 is 2312211221.

It is a super-2 number, since 2×1221122132² = 2982278522520450848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1221122132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 683594 + ... + 685377.

It is an arithmetic number, because the mean of its divisors is an integer number (178879008).

Almost surely, 2^1221122132 is an apocalyptic number.

It is an amenable number.

1221122132 is a deficient number, since it is larger than the sum of its proper divisors (925425964).

1221122132 is a wasteful number, since it uses less digits than its factorization.

1221122132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369198 (or 1369196 counting only the distinct ones).

The product of its digits is 96, while the sum is 17.

The square root of 1221122132 is about 34944.5579740251. The cubic root of 1221122132 is about 1068.8572339674.

Adding to 1221122132 its reverse (2312211221), we get a palindrome (3533333353).

It can be divided in two parts, 12211 and 22132, that added together give a palindrome (34343).

The spelling of 1221122132 in words is "one billion, two hundred twenty-one million, one hundred twenty-two thousand, one hundred thirty-two".