1001210021002 has 4 divisors (see below), whose sum is σ = 1501815031506. Its totient is φ = 500605010500.

The previous prime is 1001210020973. The next prime is 1001210021027. The reversal of 1001210021002 is 2001200121001.

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., 991141704721 + 10068316281 = 995561^2 + 100341^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1001210021002.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250302505249 + ... + 250302505252.

Almost surely, 2^{1001210021002} is an apocalyptic number.

1001210021002 is a deficient number, since it is larger than the sum of its proper divisors (500605010504).

1001210021002 is an equidigital number, since it uses as much as digits as its factorization.

1001210021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500605010503.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1001210021002 its reverse (2001200121001), we get a palindrome (3002410142003).

Subtracting 1001210021002 from its reverse (2001200121001), we obtain a palindrome (999990099999).

The spelling of 1001210021002 in words is "one trillion, one billion, two hundred ten million, twenty-one thousand, two".