1001021301021 has 16 divisors (see below), whose sum is σ = 1525417331328. Its totient is φ = 571992844800.

The previous prime is 1001021301001. The next prime is 1001021301029. The reversal of 1001021301021 is 1201031201001.

It is not a de Polignac number, because 1001021301021 - 2¹¹ = 1001021298973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1001021300988 and 1001021301006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001021301029) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 156840 + ... + 1423601.

It is an arithmetic number, because the mean of its divisors is an integer number (95338583208).

Almost surely, 2^{1001021301021} is an apocalyptic number.

It is an amenable number.

1001021301021 is a deficient number, since it is larger than the sum of its proper divisors (524396030307).

1001021301021 is a wasteful number, since it uses less digits than its factorization.

1001021301021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1610612.

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

Adding to 1001021301021 its reverse (1201031201001), we get a palindrome (2202052502022).

The spelling of 1001021301021 in words is "one trillion, one billion, twenty-one million, three hundred one thousand, twenty-one".