1001211220992 has 88 divisors (see below), whose sum is σ = 2670033042496. Its totient is φ = 333556973568.

The previous prime is 1001211220987. The next prime is 1001211221033. The reversal of 1001211220992 is 2990221121001.

It is a super-2 number, since 2×1001211220992² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5666853 + ... + 5840859.

Almost surely, 2^{1001211220992} is an apocalyptic number.

1001211220992 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 1001211220992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1335016521248).

1001211220992 is an abundant number, since it is smaller than the sum of its proper divisors (1668821821504).

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

1001211220992 is a wasteful number, since it uses less digits than its factorization.

1001211220992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175903 (or 175885 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 30.

Adding to 1001211220992 its reverse (2990221121001), we get a palindrome (3991432341993).

The spelling of 1001211220992 in words is "one trillion, one billion, two hundred eleven million, two hundred twenty thousand, nine hundred ninety-two".