1012001012221 has 16 divisors (see below), whose sum is σ = 1020561493504. Its totient is φ = 1003471777584.

The previous prime is 1012001012203. The next prime is 1012001012237. The reversal of 1012001012221 is 1222101002101.

It is a cyclic number.

It is not a de Polignac number, because 1012001012221 - 2²¹ = 1011998915069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012001012261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183098560 + ... + 183104086.

It is an arithmetic number, because the mean of its divisors is an integer number (63785093344).

Almost surely, 2^{1012001012221} is an apocalyptic number.

It is an amenable number.

1012001012221 is a deficient number, since it is larger than the sum of its proper divisors (8560481283).

1012001012221 is a wasteful number, since it uses less digits than its factorization.

1012001012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8080.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1012001012221 its reverse (1222101002101), we get a palindrome (2234102014322).

The spelling of 1012001012221 in words is "one trillion, twelve billion, one million, twelve thousand, two hundred twenty-one".