1021020212161 has 2 divisors, whose sum is σ = 1021020212162. Its totient is φ = 1021020212160.

The previous prime is 1021020212129. The next prime is 1021020212203. The reversal of 1021020212161 is 1612120201201.

1021020212161 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 can be written as a sum of positive squares in only one way, i.e., 909543690000 + 111476522161 = 953700^2 + 333881^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021020212161 - 2⁵ = 1021020212129 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021020312161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510510106080 + 510510106081.

It is an arithmetic number, because the mean of its divisors is an integer number (510510106081).

Almost surely, 2^{1021020212161} is an apocalyptic number.

It is an amenable number.

1021020212161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021020212161 is an equidigital number, since it uses as much as digits as its factorization.

1021020212161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1021020212161 its reverse (1612120201201), we get a palindrome (2633140413362).

The spelling of 1021020212161 in words is "one trillion, twenty-one billion, twenty million, two hundred twelve thousand, one hundred sixty-one".