101200002121 has 4 divisors (see below), whose sum is σ = 101223022212. Its totient is φ = 101176982032.

The previous prime is 101200002097. The next prime is 101200002149. The reversal of 101200002121 is 121200002101.

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 70868296521 + 30331705600 = 266211^2 + 174160^2 .

It is a cyclic number.

It is not a de Polignac number, because 101200002121 - 2¹³ = 101199993929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101200002098 and 101200002107.

It is not an unprimeable number, because it can be changed into a prime (101200002161) 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, 11503450 + ... + 11512243.

It is an arithmetic number, because the mean of its divisors is an integer number (25305755553).

Almost surely, 2^101200002121 is an apocalyptic number.

It is an amenable number.

101200002121 is a deficient number, since it is larger than the sum of its proper divisors (23020091).

101200002121 is an equidigital number, since it uses as much as digits as its factorization.

101200002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23020090.

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

Adding to 101200002121 its reverse (121200002101), we get a palindrome (222400004222).

The spelling of 101200002121 in words is "one hundred one billion, two hundred million, two thousand, one hundred twenty-one".