1021023030221 has 4 divisors (see below), whose sum is σ = 1048618247292. Its totient is φ = 993427813152.

The previous prime is 1021023030197. The next prime is 1021023030241. The reversal of 1021023030221 is 1220303201201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 906094572100 + 114928458121 = 951890^2 + 339011^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021023030221 - 2³⁴ = 1003843161037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021023030221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021023030241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13797608480 + ... + 13797608553.

It is an arithmetic number, because the mean of its divisors is an integer number (262154561823).

Almost surely, 2^{1021023030221} is an apocalyptic number.

It is an amenable number.

1021023030221 is a deficient number, since it is larger than the sum of its proper divisors (27595217071).

1021023030221 is an equidigital number, since it uses as much as digits as its factorization.

1021023030221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27595217070.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 1021023030221 its reverse (1220303201201), we get a palindrome (2241326231422).

The spelling of 1021023030221 in words is "one trillion, twenty-one billion, twenty-three million, thirty thousand, two hundred twenty-one".