2123204301421 has 6 divisors (see below), whose sum is σ = 2469849901710. Its totient is φ = 1819889401176.

The previous prime is 2123204301389. The next prime is 2123204301433. The reversal of 2123204301421 is 1241034023212.

It can be written as a sum of positive squares in only one way, i.e., 1803514702500 + 319689598921 = 1342950^2 + 565411^2 .

It is not a de Polignac number, because 2123204301421 - 2⁵ = 2123204301389 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 (2123204301521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21665349966 + ... + 21665350063.

It is an arithmetic number, because the mean of its divisors is an integer number (411641650285).

Almost surely, 2^{2123204301421} is an apocalyptic number.

It is an amenable number.

2123204301421 is a deficient number, since it is larger than the sum of its proper divisors (346645600289).

2123204301421 is an equidigital number, since it uses as much as digits as its factorization.

2123204301421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43330700043 (or 43330700036 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 2123204301421 its reverse (1241034023212), we get a palindrome (3364238324633).

The spelling of 2123204301421 in words is "two trillion, one hundred twenty-three billion, two hundred four million, three hundred one thousand, four hundred twenty-one".