1020210202091 has 2 divisors, whose sum is σ = 1020210202092. Its totient is φ = 1020210202090.

The previous prime is 1020210202049. The next prime is 1020210202163. The reversal of 1020210202091 is 1902020120201.

It is a happy number.

1020210202091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1020210202091 - 2³⁰ = 1019136460267 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020210202391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510105101045 + 510105101046.

It is an arithmetic number, because the mean of its divisors is an integer number (510105101046).

Almost surely, 2^{1020210202091} is an apocalyptic number.

1020210202091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020210202091 is an equidigital number, since it uses as much as digits as its factorization.

1020210202091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1020210202091 its reverse (1902020120201), we get a palindrome (2922230322292).

The spelling of 1020210202091 in words is "one trillion, twenty billion, two hundred ten million, two hundred two thousand, ninety-one".