1200031021002 has 64 divisors (see below), whose sum is σ = 2648332195200. Its totient is φ = 359469665280.

The previous prime is 1200031020967. The next prime is 1200031021027. The reversal of 1200031021002 is 2001201300021.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25569574 + ... + 25616462.

It is an arithmetic number, because the mean of its divisors is an integer number (41380190550).

Almost surely, 2^{1200031021002} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1200031021002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1324166097600).

1200031021002 is an abundant number, since it is smaller than the sum of its proper divisors (1448301174198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1200031021002 is a wasteful number, since it uses less digits than its factorization.

1200031021002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51351.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 1200031021002 its reverse (2001201300021), we get a palindrome (3201232321023).

The spelling of 1200031021002 in words is "one trillion, two hundred billion, thirty-one million, twenty-one thousand, two".