101200020121 has 4 divisors (see below), whose sum is σ = 101200657792. Its totient is φ = 101199382452.

The previous prime is 101200020109. The next prime is 101200020241. The reversal of 101200020121 is 121020002101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 101200020121 - 2²⁷ = 101065802393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101200020098 and 101200020107.

It is not an unprimeable number, because it can be changed into a prime (101200320121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127396 + ... + 467578.

It is an arithmetic number, because the mean of its divisors is an integer number (25300164448).

Almost surely, 2^101200020121 is an apocalyptic number.

It is an amenable number.

101200020121 is a deficient number, since it is larger than the sum of its proper divisors (637671).

101200020121 is an equidigital number, since it uses as much as digits as its factorization.

101200020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637670.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 101200020121 its reverse (121020002101), we get a palindrome (222220022222).

The spelling of 101200020121 in words is "one hundred one billion, two hundred million, twenty thousand, one hundred twenty-one".