1031021220004 has 12 divisors (see below), whose sum is σ = 1810051632844. Its totient is φ = 513863610624.

The previous prime is 1031021219983. The next prime is 1031021220029. The reversal of 1031021220004 is 4000221201301.

It can be written as a sum of positive squares in 2 ways, for example, as 459545698404 + 571475521600 = 677898^2 + 755960^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1031021220004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 411748437 + ... + 411750940.

Almost surely, 2^{1031021220004} is an apocalyptic number.

It is an amenable number.

1031021220004 is a deficient number, since it is larger than the sum of its proper divisors (779030412840).

1031021220004 is a wasteful number, since it uses less digits than its factorization.

1031021220004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823499694 (or 823499692 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 1031021220004 its reverse (4000221201301), we get a palindrome (5031242421305).

The spelling of 1031021220004 in words is "one trillion, thirty-one billion, twenty-one million, two hundred twenty thousand, four".