1001221122132 has 144 divisors (see below), whose sum is σ = 3159674673792. Its totient is φ = 259702122240.

The previous prime is 1001221122107. The next prime is 1001221122163. The reversal of 1001221122132 is 2312211221001.

It is a super-2 number, since 2×1001221122132² (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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1785498 + ... + 2278254.

Almost surely, 2^{1001221122132} is an apocalyptic number.

1001221122132 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 1001221122132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1579837336896).

1001221122132 is an abundant number, since it is smaller than the sum of its proper divisors (2158453551660).

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

1001221122132 is a wasteful number, since it uses less digits than its factorization.

1001221122132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493518 (or 493513 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1001221122132 its reverse (2312211221001), we get a palindrome (3313432343133).

The spelling of 1001221122132 in words is "one trillion, one billion, two hundred twenty-one million, one hundred twenty-two thousand, one hundred thirty-two".