103520132021 has 4 divisors (see below), whose sum is σ = 103522778700. Its totient is φ = 103517485344.

The previous prime is 103520132017. The next prime is 103520132077. The reversal of 103520132021 is 120231025301.

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 38224551121 + 65295580900 = 195511^2 + 255530^2 .

It is a cyclic number.

It is not a de Polignac number, because 103520132021 - 2² = 103520132017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103520131984 and 103520132002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103520132321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1263776 + ... + 1343193.

It is an arithmetic number, because the mean of its divisors is an integer number (25880694675).

Almost surely, 2^103520132021 is an apocalyptic number.

It is an amenable number.

103520132021 is a deficient number, since it is larger than the sum of its proper divisors (2646679).

103520132021 is an equidigital number, since it uses as much as digits as its factorization.

103520132021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2646678.

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 103520132021 its reverse (120231025301), we get a palindrome (223751157322).

The spelling of 103520132021 in words is "one hundred three billion, five hundred twenty million, one hundred thirty-two thousand, twenty-one".