221309949768001 has 4 divisors (see below), whose sum is σ = 221310902678272. Its totient is φ = 221308996857732.

The previous prime is 221309949767903. The next prime is 221309949768029. The reversal of 221309949768001 is 100867949903122.

221309949768001 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 221309949768001 - 2³¹ = 221307802284353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221309949768601) 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, 476106681 + ... + 476571286.

It is an arithmetic number, because the mean of its divisors is an integer number (55327725669568).

Almost surely, 2^{221309949768001} is an apocalyptic number.

It is an amenable number.

221309949768001 is a deficient number, since it is larger than the sum of its proper divisors (952910271).

221309949768001 is an equidigital number, since it uses as much as digits as its factorization.

221309949768001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952910270.

The product of its (nonzero) digits is 11757312, while the sum is 61.

The spelling of 221309949768001 in words is "two hundred twenty-one trillion, three hundred nine billion, nine hundred forty-nine million, seven hundred sixty-eight thousand, one".