103131312302021 has 4 divisors (see below), whose sum is σ = 103131889223052. Its totient is φ = 103130735380992.

The previous prime is 103131312301957. The next prime is 103131312302027. The reversal of 103131312302021 is 120203213131301.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40869349411396 + 62261962890625 = 6392914^2 + 7890625^2 .

It is a cyclic number.

It is not a de Polignac number, because 103131312302021 - 2⁶ = 103131312301957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103131312302027) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 288192290 + ... + 288549923.

It is an arithmetic number, because the mean of its divisors is an integer number (25782972305763).

Almost surely, 2^{103131312302021} is an apocalyptic number.

It is an amenable number.

103131312302021 is a deficient number, since it is larger than the sum of its proper divisors (576921031).

103131312302021 is an equidigital number, since it uses as much as digits as its factorization.

103131312302021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576921030.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 103131312302021 its reverse (120203213131301), we get a palindrome (223334525433322).

The spelling of 103131312302021 in words is "one hundred three trillion, one hundred thirty-one billion, three hundred twelve million, three hundred two thousand, twenty-one".