123120101145 has 16 divisors (see below), whose sum is σ = 197036467200. Its totient is φ = 65649285504.

The previous prime is 123120101131. The next prime is 123120101161. The reversal of 123120101145 is 541101021321.

It is not a de Polignac number, because 123120101145 - 2⁴ = 123120101129 is a prime.

It is a super-2 number, since 2×123120101145² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 853945 + ... + 987654.

It is an arithmetic number, because the mean of its divisors is an integer number (12314779200).

Almost surely, 2^123120101145 is an apocalyptic number.

123120101145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123120101145 is a deficient number, since it is larger than the sum of its proper divisors (73916366055).

123120101145 is a wasteful number, since it uses less digits than its factorization.

123120101145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1846064.

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 123120101145 its reverse (541101021321), we get a palindrome (664221122466).

The spelling of 123120101145 in words is "one hundred twenty-three billion, one hundred twenty million, one hundred one thousand, one hundred forty-five".