891227067201 has 12 divisors (see below), whose sum is σ = 1287442632528. Its totient is φ = 594098464344.

The previous prime is 891227067131. The next prime is 891227067209. The reversal of 891227067201 is 102760722198.

It is a happy number.

It is not a de Polignac number, because 891227067201 - 2¹¹ = 891227065153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (891227067209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4302675 + ... + 4505048.

It is an arithmetic number, because the mean of its divisors is an integer number (107286886044).

Almost surely, 2^891227067201 is an apocalyptic number.

It is an amenable number.

891227067201 is a deficient number, since it is larger than the sum of its proper divisors (396215565327).

891227067201 is a wasteful number, since it uses less digits than its factorization.

891227067201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8818972 (or 8818969 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

Adding to 891227067201 its reverse (102760722198), we get a palindrome (993987789399).

The spelling of 891227067201 in words is "eight hundred ninety-one billion, two hundred twenty-seven million, sixty-seven thousand, two hundred one".