420121120122321 has 16 divisors (see below), whose sum is σ = 561118430163648. Its totient is φ = 279602282937600.

The previous prime is 420121120122161. The next prime is 420121120122329. The reversal of 420121120122321 is 123221021121024.

It is not a de Polignac number, because 420121120122321 - 2¹⁸ = 420121119860177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420121120122291 and 420121120122300.

It is not an unprimeable number, because it can be changed into a prime (420121120122329) 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, 494277261 + ... + 495126501.

It is an arithmetic number, because the mean of its divisors is an integer number (35069901885228).

Almost surely, 2^{420121120122321} is an apocalyptic number.

It is an amenable number.

420121120122321 is a deficient number, since it is larger than the sum of its proper divisors (140997310041327).

420121120122321 is a wasteful number, since it uses less digits than its factorization.

420121120122321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130752.

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 420121120122321 its reverse (123221021121024), we get a palindrome (543342141243345).

The spelling of 420121120122321 in words is "four hundred twenty trillion, one hundred twenty-one billion, one hundred twenty million, one hundred twenty-two thousand, three hundred twenty-one".