2002001012021 has 4 divisors (see below), whose sum is σ = 2119765777452. Its totient is φ = 1884236246592.

The previous prime is 2002001011999. The next prime is 2002001012051. The reversal of 2002001012021 is 1202101002002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1230258088900 + 771742923121 = 1109170^2 + 878489^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002001012021 - 2¹⁴ = 2002000995637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2002001011993 and 2002001012011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002001012051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58882382690 + ... + 58882382723.

It is an arithmetic number, because the mean of its divisors is an integer number (529941444363).

Almost surely, 2^{2002001012021} is an apocalyptic number.

It is an amenable number.

2002001012021 is a deficient number, since it is larger than the sum of its proper divisors (117764765431).

2002001012021 is a wasteful number, since it uses less digits than its factorization.

2002001012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117764765430.

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

Adding to 2002001012021 its reverse (1202101002002), we get a palindrome (3204102014023).

The spelling of 2002001012021 in words is "two trillion, two billion, one million, twelve thousand, twenty-one".