123003500155 has 16 divisors (see below), whose sum is σ = 148486125600. Its totient is φ = 97815656448.

The previous prime is 123003500101. The next prime is 123003500201. The reversal of 123003500155 is 551005300321.

It is a cyclic number.

It is not a de Polignac number, because 123003500155 - 2¹⁹ = 123002975867 is a prime.

It is a super-2 number, since 2×123003500155² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1188421 + ... + 1287769.

It is an arithmetic number, because the mean of its divisors is an integer number (9280382850).

Almost surely, 2^123003500155 is an apocalyptic number.

123003500155 is a deficient number, since it is larger than the sum of its proper divisors (25482625445).

123003500155 is a wasteful number, since it uses less digits than its factorization.

123003500155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100830.

The product of its (nonzero) digits is 2250, while the sum is 25.

Adding to 123003500155 its reverse (551005300321), we get a palindrome (674008800476).

The spelling of 123003500155 in words is "one hundred twenty-three billion, three million, five hundred thousand, one hundred fifty-five".