2001210021002 has 4 divisors (see below), whose sum is σ = 3001815031506. Its totient is φ = 1000605010500.

The previous prime is 2001210020941. The next prime is 2001210021011. The reversal of 2001210021002 is 2001200121002.

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 only one way, i.e., 1373469146401 + 627740874601 = 1171951^2 + 792301^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500302505249 + ... + 500302505252.

Almost surely, 2^{2001210021002} is an apocalyptic number.

2001210021002 is a deficient number, since it is larger than the sum of its proper divisors (1000605010504).

2001210021002 is a wasteful number, since it uses less digits than its factorization.

2001210021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000605010503.

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

Adding to 2001210021002 its reverse (2001200121002), we get a palindrome (4002410142004).

The spelling of 2001210021002 in words is "two trillion, one billion, two hundred ten million, twenty-one thousand, two".