1021213044021 has 8 divisors (see below), whose sum is σ = 1362315307264. Its totient is φ = 680459738400.

The previous prime is 1021213044011. The next prime is 1021213044067. The reversal of 1021213044021 is 1204403121201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1021213044021 - 2⁵ = 1021213043989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021213044011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87232576 + ... + 87244281.

It is an arithmetic number, because the mean of its divisors is an integer number (170289413408).

Almost surely, 2^{1021213044021} is an apocalyptic number.

It is an amenable number.

1021213044021 is a deficient number, since it is larger than the sum of its proper divisors (341102263243).

1021213044021 is a wasteful number, since it uses less digits than its factorization.

1021213044021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174478811.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1021213044021 its reverse (1204403121201), we get a palindrome (2225616165222).

The spelling of 1021213044021 in words is "one trillion, twenty-one billion, two hundred thirteen million, forty-four thousand, twenty-one".