1021002220253 has 2 divisors, whose sum is σ = 1021002220254. Its totient is φ = 1021002220252.

The previous prime is 1021002220211. The next prime is 1021002220267. The reversal of 1021002220253 is 3520222001201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 533983870564 + 487018349689 = 730742^2 + 697867^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021002220253 - 2²⁶ = 1020935111389 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021002220153) by changing a digit.

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 as a sum of consecutive naturals, namely, 510501110126 + 510501110127.

It is an arithmetic number, because the mean of its divisors is an integer number (510501110127).

Almost surely, 2^{1021002220253} is an apocalyptic number.

It is an amenable number.

1021002220253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021002220253 is an equidigital number, since it uses as much as digits as its factorization.

1021002220253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 1021002220253 its reverse (3520222001201), we get a palindrome (4541224221454).

The spelling of 1021002220253 in words is "one trillion, twenty-one billion, two million, two hundred twenty thousand, two hundred fifty-three".