211201100001 has 16 divisors (see below), whose sum is σ = 313263484800. Its totient is φ = 140632898544.

The previous prime is 211201099961. The next prime is 211201100017. The reversal of 211201100001 is 100001102112.

It is a happy number.

It is not a de Polignac number, because 211201100001 - 2¹³ = 211201091809 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (211201100081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4639006 + ... + 4684311.

It is an arithmetic number, because the mean of its divisors is an integer number (19578967800).

Almost surely, 2^211201100001 is an apocalyptic number.

It is an amenable number.

211201100001 is a deficient number, since it is larger than the sum of its proper divisors (102062384799).

211201100001 is an equidigital number, since it uses as much as digits as its factorization.

211201100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9324165 (or 9324159 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 211201100001 its reverse (100001102112), we get a palindrome (311202202113).

The spelling of 211201100001 in words is "two hundred eleven billion, two hundred one million, one hundred thousand, one".