201206894512721 has 4 divisors (see below), whose sum is σ = 205886124617712. Its totient is φ = 196527664407732.

The previous prime is 201206894512691. The next prime is 201206894512747. The reversal of 201206894512721 is 127215498602102.

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 201206894512721 - 2²² = 201206890318417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201206894512721.

It is not an unprimeable number, because it can be changed into a prime (201206894512121) 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, 2339615052431 + ... + 2339615052516.

It is an arithmetic number, because the mean of its divisors is an integer number (51471531154428).

Almost surely, 2^{201206894512721} is an apocalyptic number.

It is an amenable number.

201206894512721 is a deficient number, since it is larger than the sum of its proper divisors (4679230104991).

201206894512721 is an equidigital number, since it uses as much as digits as its factorization.

201206894512721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4679230104990.

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 201206894512721 in words is "two hundred one trillion, two hundred six billion, eight hundred ninety-four million, five hundred twelve thousand, seven hundred twenty-one".