1023202012309 has 2 divisors, whose sum is σ = 1023202012310. Its totient is φ = 1023202012308.

The previous prime is 1023202012267. The next prime is 1023202012321. The reversal of 1023202012309 is 9032102023201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 992872744900 + 30329267409 = 996430^2 + 174153^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023202012309 - 2¹⁷ = 1023201881237 is a prime.

It is a super-2 number, since 2×1023202012309² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1023202012369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511601006154 + 511601006155.

It is an arithmetic number, because the mean of its divisors is an integer number (511601006155).

Almost surely, 2^{1023202012309} is an apocalyptic number.

It is an amenable number.

1023202012309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023202012309 is an equidigital number, since it uses as much as digits as its factorization.

1023202012309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The spelling of 1023202012309 in words is "one trillion, twenty-three billion, two hundred two million, twelve thousand, three hundred nine".