201954274721 has 4 divisors (see below), whose sum is σ = 201957733632. Its totient is φ = 201950815812.

The previous prime is 201954274673. The next prime is 201954274729. The reversal of 201954274721 is 127472459102.

201954274721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201954274721 - 2³⁴ = 184774405537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201954274729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1640345 + ... + 1759158.

It is an arithmetic number, because the mean of its divisors is an integer number (50489433408).

Almost surely, 2^201954274721 is an apocalyptic number.

It is an amenable number.

201954274721 is a deficient number, since it is larger than the sum of its proper divisors (3458911).

201954274721 is an equidigital number, since it uses as much as digits as its factorization.

201954274721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3458910.

The product of its (nonzero) digits is 282240, while the sum is 44.

The spelling of 201954274721 in words is "two hundred one billion, nine hundred fifty-four million, two hundred seventy-four thousand, seven hundred twenty-one".