123112001121001 has 16 divisors (see below), whose sum is σ = 127869365449728. Its totient is φ = 118404041760000.

The previous prime is 123112001120981. The next prime is 123112001121017. The reversal of 123112001121001 is 100121100211321.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 123112001121001 - 2⁹ = 123112001120489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123112001127001) 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, 24144501 + ... + 28795501.

It is an arithmetic number, because the mean of its divisors is an integer number (7991835340608).

Almost surely, 2^{123112001121001} is an apocalyptic number.

It is an amenable number.

123112001121001 is a deficient number, since it is larger than the sum of its proper divisors (4757364328727).

123112001121001 is a wasteful number, since it uses less digits than its factorization.

123112001121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4656312.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 123112001121001 its reverse (100121100211321), we get a palindrome (223233101332322).

The spelling of 123112001121001 in words is "one hundred twenty-three trillion, one hundred twelve billion, one million, one hundred twenty-one thousand, one".