123211112102 has 64 divisors (see below), whose sum is σ = 217265328000. Its totient is φ = 51927794688.

The previous prime is 123211112077. The next prime is 123211112107. The reversal of 123211112102 is 201211112321.

It is a happy number.

It is a super-2 number, since 2×123211112102² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123211112107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1503524 + ... + 1583352.

It is an arithmetic number, because the mean of its divisors is an integer number (3394770750).

Almost surely, 2^123211112102 is an apocalyptic number.

123211112102 is a deficient number, since it is larger than the sum of its proper divisors (94054215898).

123211112102 is a wasteful number, since it uses less digits than its factorization.

123211112102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79985.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 123211112102 its reverse (201211112321), we get a palindrome (324422224423).

The spelling of 123211112102 in words is "one hundred twenty-three billion, two hundred eleven million, one hundred twelve thousand, one hundred two".