100101122021 has 4 divisors (see below), whose sum is σ = 102542612844. Its totient is φ = 97659631200.

The previous prime is 100101122003. The next prime is 100101122027. The reversal of 100101122021 is 120221101001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4999197025 + 95101924996 = 70705^2 + 308386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100101122021 is a prime.

It is a super-2 number, since 2×100101122021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100101121993 and 100101122011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100101122027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1220745350 + ... + 1220745431.

It is an arithmetic number, because the mean of its divisors is an integer number (25635653211).

Almost surely, 2^100101122021 is an apocalyptic number.

It is an amenable number.

100101122021 is a deficient number, since it is larger than the sum of its proper divisors (2441490823).

100101122021 is an equidigital number, since it uses as much as digits as its factorization.

100101122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2441490822.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 100101122021 its reverse (120221101001), we get a palindrome (220322223022).

The spelling of 100101122021 in words is "one hundred billion, one hundred one million, one hundred twenty-two thousand, twenty-one".