1012221121002 has 96 divisors (see below), whose sum is σ = 2538049852800. Its totient is φ = 266755692672.

The previous prime is 1012221120973. The next prime is 1012221121007. The reversal of 1012221121002 is 2001211222101.

It is not an unprimeable number, because it can be changed into a prime (1012221121007) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4940824 + ... + 5141612.

It is an arithmetic number, because the mean of its divisors is an integer number (26438019300).

Almost surely, 2^{1012221121002} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1012221121002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1269024926400).

1012221121002 is an abundant number, since it is smaller than the sum of its proper divisors (1525828731798).

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

1012221121002 is a wasteful number, since it uses less digits than its factorization.

1012221121002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202140 (or 202133 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1012221121002 its reverse (2001211222101), we get a palindrome (3013432343103).

The spelling of 1012221121002 in words is "one trillion, twelve billion, two hundred twenty-one million, one hundred twenty-one thousand, two".