1023202020105 has 20 divisors (see below), whose sum is σ = 1834184362692. Its totient is φ = 545707743840.

The previous prime is 1023202020077. The next prime is 1023202020143. The reversal of 1023202020105 is 5010202023201.

It can be written as a sum of positive squares in 2 ways, for example, as 197117352441 + 826084667664 = 443979^2 + 908892^2 .

It is not a de Polignac number, because 1023202020105 - 2⁸ = 1023202019849 is a prime.

It is a super-2 number, since 2×1023202020105² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1263211966 + ... + 1263212775.

Almost surely, 2^{1023202020105} is an apocalyptic number.

1023202020105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1023202020105 is a deficient number, since it is larger than the sum of its proper divisors (810982342587).

1023202020105 is an equidigital number, since it uses as much as digits as its factorization.

1023202020105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2526424758 (or 2526424749 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

Adding to 1023202020105 its reverse (5010202023201), we get a palindrome (6033404043306).

The spelling of 1023202020105 in words is "one trillion, twenty-three billion, two hundred two million, twenty thousand, one hundred five".