103121120213 has 4 divisors (see below), whose sum is σ = 106677020940. Its totient is φ = 99565219488.

The previous prime is 103121120197. The next prime is 103121120231. The reversal of 103121120213 is 312021121301.

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 57435477649 + 45685642564 = 239657^2 + 213742^2 .

It is a cyclic number.

It is not a de Polignac number, because 103121120213 - 2⁴ = 103121120197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103121120191 and 103121120200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103121120273) 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, 1777950320 + ... + 1777950377.

It is an arithmetic number, because the mean of its divisors is an integer number (26669255235).

Almost surely, 2^103121120213 is an apocalyptic number.

It is an amenable number.

103121120213 is a deficient number, since it is larger than the sum of its proper divisors (3555900727).

103121120213 is an equidigital number, since it uses as much as digits as its factorization.

103121120213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3555900726.

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

Adding to 103121120213 its reverse (312021121301), we get a palindrome (415142241514).

The spelling of 103121120213 in words is "one hundred three billion, one hundred twenty-one million, one hundred twenty thousand, two hundred thirteen".