103121220409 has 2 divisors, whose sum is σ = 103121220410. Its totient is φ = 103121220408.

The previous prime is 103121220353. The next prime is 103121220413. The reversal of 103121220409 is 904022121301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91160517184 + 11960703225 = 301928^2 + 109365^2 .

It is a cyclic number.

It is not a de Polignac number, because 103121220409 - 2¹³ = 103121212217 is a prime.

It is not a weakly prime, because it can be changed into another prime (103121220439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51560610204 + 51560610205.

It is an arithmetic number, because the mean of its divisors is an integer number (51560610205).

Almost surely, 2^103121220409 is an apocalyptic number.

It is an amenable number.

103121220409 is a deficient number, since it is larger than the sum of its proper divisors (1).

103121220409 is an equidigital number, since it uses as much as digits as its factorization.

103121220409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 103121220409 in words is "one hundred three billion, one hundred twenty-one million, two hundred twenty thousand, four hundred nine".