1021023123101 has 2 divisors, whose sum is σ = 1021023123102. Its totient is φ = 1021023123100.

The previous prime is 1021023123061. The next prime is 1021023123143. The reversal of 1021023123101 is 1013213201201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1019282064025 + 1741059076 = 1009595^2 + 41726^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021023123101 - 2²⁶ = 1020956014237 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1021023123101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021023123181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510511561550 + 510511561551.

It is an arithmetic number, because the mean of its divisors is an integer number (510511561551).

Almost surely, 2^{1021023123101} is an apocalyptic number.

It is an amenable number.

1021023123101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021023123101 is an equidigital number, since it uses as much as digits as its factorization.

1021023123101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1021023123101 its reverse (1013213201201), we get a palindrome (2034236324302).

The spelling of 1021023123101 in words is "one trillion, twenty-one billion, twenty-three million, one hundred twenty-three thousand, one hundred one".