200202100212121 has 4 divisors (see below), whose sum is σ = 228802400242432. Its totient is φ = 171601800181812.

The previous prime is 200202100212113. The next prime is 200202100212131. The reversal of 200202100212121 is 121212001202002.

It is a happy number.

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.

It is not a de Polignac number, because 200202100212121 - 2³ = 200202100212113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200202100212095 and 200202100212104.

It is not an unprimeable number, because it can be changed into a prime (200202100212131) 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, 14300150015145 + ... + 14300150015158.

It is an arithmetic number, because the mean of its divisors is an integer number (57200600060608).

Almost surely, 2^{200202100212121} is an apocalyptic number.

It is an amenable number.

200202100212121 is a deficient number, since it is larger than the sum of its proper divisors (28600300030311).

200202100212121 is an equidigital number, since it uses as much as digits as its factorization.

200202100212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28600300030310.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 200202100212121 its reverse (121212001202002), we get a palindrome (321414101414123).

The spelling of 200202100212121 in words is "two hundred trillion, two hundred two billion, one hundred million, two hundred twelve thousand, one hundred twenty-one".