123421201004111 has 4 divisors (see below), whose sum is σ = 123490422094512. Its totient is φ = 123351979913712.

The previous prime is 123421201004099. The next prime is 123421201004131. The reversal of 123421201004111 is 111400102124321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123421201004111 - 2²⁶ = 123421133895247 is a prime.

It is a super-2 number, since 2×123421201004111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123421201004131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34610542526 + ... + 34610546091.

It is an arithmetic number, because the mean of its divisors is an integer number (30872605523628).

Almost surely, 2^{123421201004111} is an apocalyptic number.

123421201004111 is a deficient number, since it is larger than the sum of its proper divisors (69221090401).

123421201004111 is an equidigital number, since it uses as much as digits as its factorization.

123421201004111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69221090400.

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 123421201004111 its reverse (111400102124321), we get a palindrome (234821303128432).

The spelling of 123421201004111 in words is "one hundred twenty-three trillion, four hundred twenty-one billion, two hundred one million, four thousand, one hundred eleven".