1001221002012 has 48 divisors (see below), whose sum is σ = 2912642917632. Its totient is φ = 260057402880.

The previous prime is 1001221001993. The next prime is 1001221002121. The reversal of 1001221002012 is 2102001221001.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 541785333 + ... + 541787180.

It is an arithmetic number, because the mean of its divisors is an integer number (60680060784).

Almost surely, 2^{1001221002012} is an apocalyptic number.

1001221002012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1001221002012 is an abundant number, since it is smaller than the sum of its proper divisors (1911421915620).

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

1001221002012 is a wasteful number, since it uses less digits than its factorization.

1001221002012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083572538 (or 1083572536 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1001221002012 its reverse (2102001221001), we get a palindrome (3103222223013).

The spelling of 1001221002012 in words is "one trillion, one billion, two hundred twenty-one million, two thousand, twelve".