200121121005 has 48 divisors (see below), whose sum is σ = 349213717440. Its totient is φ = 97812209664.

The previous prime is 200121120989. The next prime is 200121121049. The reversal of 200121121005 is 500121121002.

It is not a de Polignac number, because 200121121005 - 2⁴ = 200121120989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 68397 + ... + 636333.

It is an arithmetic number, because the mean of its divisors is an integer number (7275285780).

Almost surely, 2^200121121005 is an apocalyptic number.

It is an amenable number.

200121121005 is a deficient number, since it is larger than the sum of its proper divisors (149092596435).

200121121005 is a wasteful number, since it uses less digits than its factorization.

200121121005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568110 (or 568097 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

Adding to 200121121005 its reverse (500121121002), we get a palindrome (700242242007).

The spelling of 200121121005 in words is "two hundred billion, one hundred twenty-one million, one hundred twenty-one thousand, five".