1021001201021 has 2 divisors, whose sum is σ = 1021001201022. Its totient is φ = 1021001201020.

The previous prime is 1021001200979. The next prime is 1021001201057. The reversal of 1021001201021 is 1201021001201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 527896699225 + 493104501796 = 726565^2 + 702214^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021001201021 - 2¹⁸ = 1021000938877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021001200993 and 1021001201011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021001201081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510500600510 + 510500600511.

It is an arithmetic number, because the mean of its divisors is an integer number (510500600511).

Almost surely, 2^{1021001201021} is an apocalyptic number.

It is an amenable number.

1021001201021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021001201021 is an equidigital number, since it uses as much as digits as its factorization.

1021001201021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1021001201021 its reverse (1201021001201), we get a palindrome (2222022202222).

The spelling of 1021001201021 in words is "one trillion, twenty-one billion, one million, two hundred one thousand, twenty-one".