123121010132 has 6 divisors (see below), whose sum is σ = 215461767738. Its totient is φ = 61560505064.

The previous prime is 123121010123. The next prime is 123121010143. The reversal of 123121010132 is 231010121321.

It can be written as a sum of positive squares in only one way, i.e., 115849013956 + 7271996176 = 340366^2 + 85276^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 123121010132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15390126263 + ... + 15390126270.

It is an arithmetic number, because the mean of its divisors is an integer number (35910294623).

Almost surely, 2^123121010132 is an apocalyptic number.

It is an amenable number.

123121010132 is a deficient number, since it is larger than the sum of its proper divisors (92340757606).

123121010132 is a wasteful number, since it uses less digits than its factorization.

123121010132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30780252537 (or 30780252535 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 123121010132 its reverse (231010121321), we get a palindrome (354131131453).

The spelling of 123121010132 in words is "one hundred twenty-three billion, one hundred twenty-one million, ten thousand, one hundred thirty-two".