4021423132225 has 6 divisors (see below), whose sum is σ = 4986564683990. Its totient is φ = 3217138505760.

The previous prime is 4021423132219. The next prime is 4021423132229. The reversal of 4021423132225 is 5222313241204.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1400880553744 + 2620542578481 = 1183588^2 + 1618809^2 .

It is not a de Polignac number, because 4021423132225 - 2²³ = 4021414743617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4021423132229) 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, 80428462620 + ... + 80428462669.

Almost surely, 2^{4021423132225} is an apocalyptic number.

It is an amenable number.

4021423132225 is a deficient number, since it is larger than the sum of its proper divisors (965141551765).

4021423132225 is a wasteful number, since it uses less digits than its factorization.

4021423132225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160856925299 (or 160856925294 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 4021423132225 its reverse (5222313241204), we get a palindrome (9243736373429).

The spelling of 4021423132225 in words is "four trillion, twenty-one billion, four hundred twenty-three million, one hundred thirty-two thousand, two hundred twenty-five".