103121020121221 has 4 divisors (see below), whose sum is σ = 103501540490944. Its totient is φ = 102740499751500.

The previous prime is 103121020121177. The next prime is 103121020121257. The reversal of 103121020121221 is 122121020121301.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 103121020121221 - 2¹³ = 103121020113029 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 (103121020151221) 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, 190260184455 + ... + 190260184996.

It is an arithmetic number, because the mean of its divisors is an integer number (25875385122736).

Almost surely, 2^{103121020121221} is an apocalyptic number.

It is an amenable number.

103121020121221 is a deficient number, since it is larger than the sum of its proper divisors (380520369723).

103121020121221 is an equidigital number, since it uses as much as digits as its factorization.

103121020121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380520369722.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 103121020121221 its reverse (122121020121301), we get a palindrome (225242040242522).

The spelling of 103121020121221 in words is "one hundred three trillion, one hundred twenty-one billion, twenty million, one hundred twenty-one thousand, two hundred twenty-one".