103121210020091 has 2 divisors, whose sum is σ = 103121210020092. Its totient is φ = 103121210020090.

The previous prime is 103121210020067. The next prime is 103121210020109. The reversal of 103121210020091 is 190020012121301.

Together with next prime (103121210020109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 103121210020091 - 2¹⁰ = 103121210019067 is a prime.

It is not a weakly prime, because it can be changed into another prime (103121210020021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51560605010045 + 51560605010046.

It is an arithmetic number, because the mean of its divisors is an integer number (51560605010046).

Almost surely, 2^{103121210020091} is an apocalyptic number.

103121210020091 is a deficient number, since it is larger than the sum of its proper divisors (1).

103121210020091 is an equidigital number, since it uses as much as digits as its factorization.

103121210020091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 23.

Adding to 103121210020091 its reverse (190020012121301), we get a palindrome (293141222141392).

The spelling of 103121210020091 in words is "one hundred three trillion, one hundred twenty-one billion, two hundred ten million, twenty thousand, ninety-one".