4321013212121 has 16 divisors (see below), whose sum is σ = 4350660726720. Its totient is φ = 4291484613120.

The previous prime is 4321013212097. The next prime is 4321013212183. The reversal of 4321013212121 is 1212123101234.

It is a cyclic number.

It is not a de Polignac number, because 4321013212121 - 2²² = 4321009017817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4321013215121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158608061 + ... + 158635301.

It is an arithmetic number, because the mean of its divisors is an integer number (271916295420).

Almost surely, 2^{4321013212121} is an apocalyptic number.

It is an amenable number.

4321013212121 is a deficient number, since it is larger than the sum of its proper divisors (29647514599).

4321013212121 is a wasteful number, since it uses less digits than its factorization.

4321013212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29384.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 4321013212121 its reverse (1212123101234), we get a palindrome (5533136313355).

The spelling of 4321013212121 in words is "four trillion, three hundred twenty-one billion, thirteen million, two hundred twelve thousand, one hundred twenty-one".