200101211021 has 4 divisors (see below), whose sum is σ = 200102176512. Its totient is φ = 200100245532.

The previous prime is 200101210949. The next prime is 200101211047. The reversal of 200101211021 is 120112101002.

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 200101211021 - 2²⁶ = 200034102157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 200101210993 and 200101211011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200101211071) 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, 30875 + ... + 633368.

It is an arithmetic number, because the mean of its divisors is an integer number (50025544128).

Almost surely, 2^200101211021 is an apocalyptic number.

It is an amenable number.

200101211021 is a deficient number, since it is larger than the sum of its proper divisors (965491).

200101211021 is an equidigital number, since it uses as much as digits as its factorization.

200101211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965490.

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

Adding to 200101211021 its reverse (120112101002), we get a palindrome (320213312023).

The spelling of 200101211021 in words is "two hundred billion, one hundred one million, two hundred eleven thousand, twenty-one".