200101002121 has 4 divisors (see below), whose sum is σ = 200101993744. Its totient is φ = 200100010500.

The previous prime is 200101002109. The next prime is 200101002137. The reversal of 200101002121 is 121200101002.

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 200101002121 - 2²¹ = 200098904969 is a prime.

It is a super-2 number, since 2×200101002121² (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 = 200101002098 and 200101002107.

It is not an unprimeable number, because it can be changed into a prime (200101002161) 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, 72855 + ... + 636796.

It is an arithmetic number, because the mean of its divisors is an integer number (50025498436).

Almost surely, 2^200101002121 is an apocalyptic number.

It is an amenable number.

200101002121 is a deficient number, since it is larger than the sum of its proper divisors (991623).

200101002121 is an equidigital number, since it uses as much as digits as its factorization.

200101002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991622.

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

Adding to 200101002121 its reverse (121200101002), we get a palindrome (321301103123).

It can be divided in two parts, 200101002 and 121, that multiplied together give a palindrome (24212221242).

The spelling of 200101002121 in words is "two hundred billion, one hundred one million, two thousand, one hundred twenty-one".