201328214921 has 2 divisors, whose sum is σ = 201328214922. Its totient is φ = 201328214920.

The previous prime is 201328214837. The next prime is 201328214933. The reversal of 201328214921 is 129412823102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198541536400 + 2786678521 = 445580^2 + 52789^2 .

It is a cyclic number.

It is not a de Polignac number, because 201328214921 - 2¹⁰ = 201328213897 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (201328214951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100664107460 + 100664107461.

It is an arithmetic number, because the mean of its divisors is an integer number (100664107461).

Almost surely, 2^201328214921 is an apocalyptic number.

It is an amenable number.

201328214921 is a deficient number, since it is larger than the sum of its proper divisors (1).

201328214921 is an equidigital number, since it uses as much as digits as its factorization.

201328214921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 35.

The spelling of 201328214921 in words is "two hundred one billion, three hundred twenty-eight million, two hundred fourteen thousand, nine hundred twenty-one".