2012321201421 has 4 divisors (see below), whose sum is σ = 2683094935232. Its totient is φ = 1341547467612.

The previous prime is 2012321201419. The next prime is 2012321201441. The reversal of 2012321201421 is 1241021232102.

It is a happy number.

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 not a de Polignac number, because 2012321201421 - 2¹ = 2012321201419 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 (2012321201441) 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, 335386866901 + ... + 335386866906.

It is an arithmetic number, because the mean of its divisors is an integer number (670773733808).

Almost surely, 2^{2012321201421} is an apocalyptic number.

It is an amenable number.

2012321201421 is a deficient number, since it is larger than the sum of its proper divisors (670773733811).

2012321201421 is an equidigital number, since it uses as much as digits as its factorization.

2012321201421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670773733810.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 2012321201421 its reverse (1241021232102), we get a palindrome (3253342433523).

The spelling of 2012321201421 in words is "two trillion, twelve billion, three hundred twenty-one million, two hundred one thousand, four hundred twenty-one".