103121401421 has 4 divisors (see below), whose sum is σ = 103173145212. Its totient is φ = 103069657632.

The previous prime is 103121401399. The next prime is 103121401433. The reversal of 103121401421 is 124104121301.

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 78719524900 + 24401876521 = 280570^2 + 156211^2 .

It is a cyclic number.

It is not a de Polignac number, because 103121401421 - 2²² = 103117207117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103121401393 and 103121401402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103121401321) 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, 25868906 + ... + 25872891.

It is an arithmetic number, because the mean of its divisors is an integer number (25793286303).

Almost surely, 2^103121401421 is an apocalyptic number.

It is an amenable number.

103121401421 is a deficient number, since it is larger than the sum of its proper divisors (51743791).

103121401421 is an equidigital number, since it uses as much as digits as its factorization.

103121401421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51743790.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 103121401421 its reverse (124104121301), we get a palindrome (227225522722).

The spelling of 103121401421 in words is "one hundred three billion, one hundred twenty-one million, four hundred one thousand, four hundred twenty-one".