4123400221121 has 4 divisors (see below), whose sum is σ = 4153498033092. Its totient is φ = 4093302409152.

The previous prime is 4123400221079. The next prime is 4123400221123. The reversal of 4123400221121 is 1211220043214.

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 1861191705025 + 2262208516096 = 1364255^2 + 1504064^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4123400221121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4123400221123) 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, 15048905780 + ... + 15048906053.

It is an arithmetic number, because the mean of its divisors is an integer number (1038374508273).

Almost surely, 2^{4123400221121} is an apocalyptic number.

It is an amenable number.

4123400221121 is a deficient number, since it is larger than the sum of its proper divisors (30097811971).

4123400221121 is a wasteful number, since it uses less digits than its factorization.

4123400221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30097811970.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 4123400221121 its reverse (1211220043214), we get a palindrome (5334620264335).

The spelling of 4123400221121 in words is "four trillion, one hundred twenty-three billion, four hundred million, two hundred twenty-one thousand, one hundred twenty-one".