200121121019 has 4 divisors (see below), whose sum is σ = 207021849360. Its totient is φ = 193220392680.

The previous prime is 200121120989. The next prime is 200121121049. The reversal of 200121121019 is 910121121002.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (200121120989) and next prime (200121121049).

It is a cyclic number.

It is not a de Polignac number, because 200121121019 - 2⁸ = 200121120763 is a prime.

It is a super-2 number, since 2×200121121019² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200121121049) 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, 3450364127 + ... + 3450364184.

It is an arithmetic number, because the mean of its divisors is an integer number (51755462340).

Almost surely, 2^200121121019 is an apocalyptic number.

200121121019 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

200121121019 is a deficient number, since it is larger than the sum of its proper divisors (6900728341).

200121121019 is an equidigital number, since it uses as much as digits as its factorization.

200121121019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6900728340.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 200121121019 in words is "two hundred billion, one hundred twenty-one million, one hundred twenty-one thousand, nineteen".