100122120021 has 16 divisors (see below), whose sum is σ = 166436771328. Its totient is φ = 52011490800.

The previous prime is 100122120001. The next prime is 100122120047. The reversal of 100122120021 is 120021221001.

It is not a de Polignac number, because 100122120021 - 2⁹ = 100122119509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100122119979 and 100122120006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100122120001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216714315 + ... + 216714776.

It is an arithmetic number, because the mean of its divisors is an integer number (10402298208).

Almost surely, 2^100122120021 is an apocalyptic number.

100122120021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

100122120021 is a deficient number, since it is larger than the sum of its proper divisors (66314651307).

100122120021 is a wasteful number, since it uses less digits than its factorization.

100122120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433429112.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 100122120021 its reverse (120021221001), we get a palindrome (220143341022).

The spelling of 100122120021 in words is "one hundred billion, one hundred twenty-two million, one hundred twenty thousand, twenty-one".