1001202002021 has 48 divisors (see below), whose sum is σ = 1213017181824. Its totient is φ = 819581469696.

The previous prime is 1001202002011. The next prime is 1001202002051. The reversal of 1001202002021 is 1202002021001.

It is a happy number.

It is not a de Polignac number, because 1001202002021 - 2²² = 1001197807717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1001202001993 and 1001202002011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001202002011) 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 47 ways as a sum of consecutive naturals, for example, 5703071 + ... + 5876003.

It is an arithmetic number, because the mean of its divisors is an integer number (25271191288).

Almost surely, 2^{1001202002021} is an apocalyptic number.

It is an amenable number.

1001202002021 is a deficient number, since it is larger than the sum of its proper divisors (211815179803).

1001202002021 is a wasteful number, since it uses less digits than its factorization.

1001202002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173070 (or 173053 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1001202002021 its reverse (1202002021001), we get a palindrome (2203204023022).

The spelling of 1001202002021 in words is "one trillion, one billion, two hundred two million, two thousand, twenty-one".