121432100103 has 16 divisors (see below), whose sum is σ = 179914644960. Its totient is φ = 80947876608.

The previous prime is 121432100081. The next prime is 121432100107. The reversal of 121432100103 is 301001234121.

121432100103 is a `hidden beast` number, since 121 + 432 + 10 + 0 + 103 = 666.

It is not a de Polignac number, because 121432100103 - 2³⁴ = 104252230919 is a prime.

It is a super-4 number, since 4×121432100103⁴ (a number of 45 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121432100107) by changing a digit.

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, 144951 + ... + 513687.

It is an arithmetic number, because the mean of its divisors is an integer number (11244665310).

Almost surely, 2^121432100103 is an apocalyptic number.

121432100103 is a deficient number, since it is larger than the sum of its proper divisors (58482544857).

121432100103 is a wasteful number, since it uses less digits than its factorization.

121432100103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380943 (or 380937 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 121432100103 its reverse (301001234121), we get a palindrome (422433334224).

The spelling of 121432100103 in words is "one hundred twenty-one billion, four hundred thirty-two million, one hundred thousand, one hundred three".