123121102 has 16 divisors (see below), whose sum is σ = 209356560. Its totient is φ = 53834112.

The previous prime is 123121099. The next prime is 123121109. The reversal of 123121102 is 201121321.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123121109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124123 + ... + 125110.

It is an arithmetic number, because the mean of its divisors is an integer number (13084785).

Almost surely, 2^123121102 is an apocalyptic number.

123121102 is a deficient number, since it is larger than the sum of its proper divisors (86235458).

123121102 is a wasteful number, since it uses less digits than its factorization.

123121102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249267.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 123121102 is about 11095.9948630125. The cubic root of 123121102 is about 497.4821447596.

Adding to 123121102 its reverse (201121321), we get a palindrome (324242423).

The spelling of 123121102 in words is "one hundred twenty-three million, one hundred twenty-one thousand, one hundred two".