201250023316621 has 4 divisors (see below), whose sum is σ = 205047193567932. Its totient is φ = 197452853065312.

The previous prime is 201250023316571. The next prime is 201250023316627. The reversal of 201250023316621 is 126613320052102.

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

It can be written as a sum of positive squares in 2 ways, for example, as 141283414512900 + 59966608803721 = 11886270^2 + 7743811^2 .

It is a cyclic number.

It is not a de Polignac number, because 201250023316621 - 2¹³ = 201250023308429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201250023316627) 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, 1898585125576 + ... + 1898585125681.

It is an arithmetic number, because the mean of its divisors is an integer number (51261798391983).

Almost surely, 2^{201250023316621} is an apocalyptic number.

It is an amenable number.

201250023316621 is a deficient number, since it is larger than the sum of its proper divisors (3797170251311).

201250023316621 is an equidigital number, since it uses as much as digits as its factorization.

201250023316621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3797170251310.

The product of its (nonzero) digits is 25920, while the sum is 34.

Adding to 201250023316621 its reverse (126613320052102), we get a palindrome (327863343368723).

The spelling of 201250023316621 in words is "two hundred one trillion, two hundred fifty billion, twenty-three million, three hundred sixteen thousand, six hundred twenty-one".