421202140542123 has 16 divisors (see below), whose sum is σ = 582112326351360. Its totient is φ = 270725034118176.

The previous prime is 421202140542023. The next prime is 421202140542149. The reversal of 421202140542123 is 321245041202124.

It is not a de Polignac number, because 421202140542123 - 2¹³ = 421202140533931 is a prime.

It is a super-2 number, since 2×421202140542123² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (421202140542023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22292895208 + ... + 22292914101.

It is an arithmetic number, because the mean of its divisors is an integer number (36382020396960).

Almost surely, 2^{421202140542123} is an apocalyptic number.

421202140542123 is a deficient number, since it is larger than the sum of its proper divisors (160910185809237).

421202140542123 is a wasteful number, since it uses less digits than its factorization.

421202140542123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44585809426.

The product of its (nonzero) digits is 30720, while the sum is 33.

Adding to 421202140542123 its reverse (321245041202124), we get a palindrome (742447181744247).

The spelling of 421202140542123 in words is "four hundred twenty-one trillion, two hundred two billion, one hundred forty million, five hundred forty-two thousand, one hundred twenty-three".