1002001122021 has 16 divisors (see below), whose sum is σ = 1410898227200. Its totient is φ = 630781425648.

The previous prime is 1002001121987. The next prime is 1002001122079. The reversal of 1002001122021 is 1202211002001.

It is not a de Polignac number, because 1002001122021 - 2²² = 1001996927717 is a prime.

It is a super-2 number, since 2×1002001122021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1002001121988 and 1002001122006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002001122091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28612741 + ... + 28647738.

It is an arithmetic number, because the mean of its divisors is an integer number (88181139200).

Almost surely, 2^{1002001122021} is an apocalyptic number.

It is an amenable number.

1002001122021 is a deficient number, since it is larger than the sum of its proper divisors (408897105179).

1002001122021 is a wasteful number, since it uses less digits than its factorization.

1002001122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57260808.

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

Adding to 1002001122021 its reverse (1202211002001), we get a palindrome (2204212124022).

It can be divided in two parts, 100200 and 1122021, that added together give a palindrome (1222221).

The spelling of 1002001122021 in words is "one trillion, two billion, one million, one hundred twenty-two thousand, twenty-one".