2001202000021 has 8 divisors (see below), whose sum is σ = 2299723846784. Its totient is φ = 1705839114960.

The previous prime is 2001201999947. The next prime is 2001202000027. The reversal of 2001202000021 is 1200002021002.

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 2001202000021 - 2²¹ = 2001199902869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001201999971 and 2001202000007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001202000027) 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, 789739065 + ... + 789741598.

It is an arithmetic number, because the mean of its divisors is an integer number (287465480848).

Almost surely, 2^{2001202000021} is an apocalyptic number.

It is an amenable number.

2001202000021 is a deficient number, since it is larger than the sum of its proper divisors (298521846763).

2001202000021 is a wasteful number, since it uses less digits than its factorization.

2001202000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1579480851.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 2001202000021 its reverse (1200002021002), we get a palindrome (3201204021023).

The spelling of 2001202000021 in words is "two trillion, one billion, two hundred two million, twenty-one", and thus it is an aban number.