421221202122123 has 24 divisors (see below), whose sum is σ = 660234759584400. Its totient is φ = 257234321897280.

The previous prime is 421221202122103. The next prime is 421221202122151. The reversal of 421221202122123 is 321221202122124.

421221202122123 is a `hidden beast` number, since 4 + 21 + 2 + 212 + 0 + 212 + 212 + 3 = 666.

It is not a de Polignac number, because 421221202122123 - 2⁶ = 421221202122059 is a prime.

It is a super-2 number, since 2×421221202122123² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (421221202122103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13741134348 + ... + 13741165001.

It is an arithmetic number, because the mean of its divisors is an integer number (27509781649350).

Almost surely, 2^{421221202122123} is an apocalyptic number.

421221202122123 is a deficient number, since it is larger than the sum of its proper divisors (239013557462277).

421221202122123 is a wasteful number, since it uses less digits than its factorization.

421221202122123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27482299499 (or 27482299496 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 421221202122123 its reverse (321221202122124), we get a palindrome (742442404244247).

Subtracting from 421221202122123 its reverse (321221202122124), we obtain a palindrome (99999999999999).

The spelling of 421221202122123 in words is "four hundred twenty-one trillion, two hundred twenty-one billion, two hundred two million, one hundred twenty-two thousand, one hundred twenty-three".