1001230021021 has 2 divisors, whose sum is σ = 1001230021022. Its totient is φ = 1001230021020.

The previous prime is 1001230020971. The next prime is 1001230021039. The reversal of 1001230021021 is 1201200321001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 988057868121 + 13172152900 = 994011^2 + 114770^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001230021021 - 2¹⁷ = 1001229889949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1001230020992 and 1001230021010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001230021921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500615010510 + 500615010511.

It is an arithmetic number, because the mean of its divisors is an integer number (500615010511).

Almost surely, 2^{1001230021021} is an apocalyptic number.

It is an amenable number.

1001230021021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001230021021 is an equidigital number, since it uses as much as digits as its factorization.

1001230021021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 1001230021021 its reverse (1201200321001), we get a palindrome (2202430342022).

The spelling of 1001230021021 in words is "one trillion, one billion, two hundred thirty million, twenty-one thousand, twenty-one".