421102123 has 16 divisors (see below), whose sum is σ = 459839520. Its totient is φ = 383302656.

The previous prime is 421102091. The next prime is 421102133. The reversal of 421102123 is 321201124.

It is a cyclic number.

It is not a de Polignac number, because 421102123 - 2⁵ = 421102091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421102097 and 421102106.

It is not an unprimeable number, because it can be changed into a prime (421102133) 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, 527961 + ... + 528757.

It is an arithmetic number, because the mean of its divisors is an integer number (28739970).

Almost surely, 2^421102123 is an apocalyptic number.

421102123 is a deficient number, since it is larger than the sum of its proper divisors (38737397).

421102123 is a wasteful number, since it uses less digits than its factorization.

421102123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 421102123 is about 20520.7729630246. The cubic root of 421102123 is about 749.5417188430.

Adding to 421102123 its reverse (321201124), we get a palindrome (742303247).

Subtracting from 421102123 its reverse (321201124), we obtain a palindrome (99900999).

The spelling of 421102123 in words is "four hundred twenty-one million, one hundred two thousand, one hundred twenty-three".