1001211221024 has 48 divisors (see below), whose sum is σ = 2252838184128. Its totient is φ = 429069011712.

The previous prime is 1001211220987. The next prime is 1001211221033. The reversal of 1001211221024 is 4201221121001.

It is a junction number, because it is equal to n+sod(n) for n = 1001211220993 and 1001211221011.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4856819 + ... + 5058765.

It is an arithmetic number, because the mean of its divisors is an integer number (46934128836).

Almost surely, 2^{1001211221024} is an apocalyptic number.

1001211221024 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1001211221024 is an abundant number, since it is smaller than the sum of its proper divisors (1251626963104).

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

1001211221024 is a wasteful number, since it uses less digits than its factorization.

1001211221024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224097 (or 224089 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1001211221024 its reverse (4201221121001), we get a palindrome (5202432342025).

The spelling of 1001211221024 in words is "one trillion, one billion, two hundred eleven million, two hundred twenty-one thousand, twenty-four".