200121013 has 2 divisors, whose sum is σ = 200121014. Its totient is φ = 200121012.

The previous prime is 200121007. The next prime is 200121023. The reversal of 200121013 is 310121002.

It is an a-pointer prime, because the next prime (200121023) can be obtained adding 200121013 to its sum of digits (10).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117983044 + 82137969 = 10862^2 + 9063^2 .

It is a cyclic number.

It is not a de Polignac number, because 200121013 - 2⁵ = 200120981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200121023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100060506 + 100060507.

It is an arithmetic number, because the mean of its divisors is an integer number (100060507).

Almost surely, 2^200121013 is an apocalyptic number.

It is an amenable number.

200121013 is a deficient number, since it is larger than the sum of its proper divisors (1).

200121013 is an equidigital number, since it uses as much as digits as its factorization.

200121013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 200121013 is about 14146.4134323863. The cubic root of 200121013 is about 584.9214719147.

Adding to 200121013 its reverse (310121002), we get a palindrome (510242015).

It can be divided in two parts, 20012 and 1013, that added together give a square (21025 = 145²).

The spelling of 200121013 in words is "two hundred million, one hundred twenty-one thousand, thirteen".