100120202123 has 4 divisors (see below), whose sum is σ = 100121518848. Its totient is φ = 100118885400.

The previous prime is 100120202111. The next prime is 100120202177. The reversal of 100120202123 is 321202021001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321202021001 = 294337 ⋅1091273.

It is a cyclic number.

It is not a de Polignac number, because 100120202123 - 2¹⁸ = 100119939979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100120202098 and 100120202107.

It is not an unprimeable number, because it can be changed into a prime (100120202323) 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 3 ways as a sum of consecutive naturals, for example, 536828 + ... + 698873.

It is an arithmetic number, because the mean of its divisors is an integer number (25030379712).

Almost surely, 2^100120202123 is an apocalyptic number.

100120202123 is a deficient number, since it is larger than the sum of its proper divisors (1316725).

100120202123 is an equidigital number, since it uses as much as digits as its factorization.

100120202123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1316724.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 100120202123 its reverse (321202021001), we get a palindrome (421322223124).

The spelling of 100120202123 in words is "one hundred billion, one hundred twenty million, two hundred two thousand, one hundred twenty-three".