1002021011021 has 8 divisors (see below), whose sum is σ = 1062828044280. Its totient is φ = 941421157888.

The previous prime is 1002021010943. The next prime is 1002021011023. The reversal of 1002021011021 is 1201101202001.

It can be written as a sum of positive squares in 4 ways, for example, as 3998032900 + 998022978121 = 63230^2 + 999011^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1002021011021 - 2¹⁸ = 1002020748877 is a prime.

It is a super-2 number, since 2×1002021011021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002021010993 and 1002021011011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002021011023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51785066 + ... + 51804411.

It is an arithmetic number, because the mean of its divisors is an integer number (132853505535).

Almost surely, 2^{1002021011021} is an apocalyptic number.

It is an amenable number.

1002021011021 is a deficient number, since it is larger than the sum of its proper divisors (60807033259).

1002021011021 is a wasteful number, since it uses less digits than its factorization.

1002021011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103590063.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1002021011021 its reverse (1201101202001), we get a palindrome (2203122213022).

The spelling of 1002021011021 in words is "one trillion, two billion, twenty-one million, eleven thousand, twenty-one".