123456543210001 has 16 divisors (see below), whose sum is σ = 126645860453200. Its totient is φ = 120305071411200.

The previous prime is 123456543209977. The next prime is 123456543210059. The reversal of 123456543210001 is 100012345654321.

It is a Cunningham number, because it is equal to 11111100²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 17675297640000 + 105781245570001 = 4204200^2 + 10285001^2 .

It is a cyclic number.

It is not a de Polignac number, because 123456543210001 - 2⁷ = 123456543209873 is a prime.

It is a super-2 number, since 2×123456543210001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123456543213001) 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, 58329181 + ... + 60408661.

It is an arithmetic number, because the mean of its divisors is an integer number (7915366278325).

Almost surely, 2^{123456543210001} is an apocalyptic number.

It is an amenable number.

123456543210001 is a deficient number, since it is larger than the sum of its proper divisors (3189317243199).

123456543210001 is a wasteful number, since it uses less digits than its factorization.

123456543210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2088580.

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 123456543210001 its reverse (100012345654321), we get a palindrome (223468888864322).

The spelling of 123456543210001 in words is "one hundred twenty-three trillion, four hundred fifty-six billion, five hundred forty-three million, two hundred ten thousand, one".