1011000202021 has 2 divisors, whose sum is σ = 1011000202022. Its totient is φ = 1011000202020.

The previous prime is 1011000202007. The next prime is 1011000202049. The reversal of 1011000202021 is 1202020001101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 965954808900 + 45045393121 = 982830^2 + 212239^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011000202021 - 2³³ = 1002410267429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1011000201989 and 1011000202007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011000202321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505500101010 + 505500101011.

It is an arithmetic number, because the mean of its divisors is an integer number (505500101011).

Almost surely, 2^{1011000202021} is an apocalyptic number.

It is an amenable number.

1011000202021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011000202021 is an equidigital number, since it uses as much as digits as its factorization.

1011000202021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1011000202021 its reverse (1202020001101), we get a palindrome (2213020203122).

The spelling of 1011000202021 in words is "one trillion, eleven billion, two hundred two thousand, twenty-one".