211001120001 has 24 divisors (see below), whose sum is σ = 357733348544. Its totient is φ = 117313362720.

The previous prime is 211001119993. The next prime is 211001120003. The reversal of 211001120001 is 100021100112.

It is a happy number.

It is not a de Polignac number, because 211001120001 - 2³ = 211001119993 is a prime.

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

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (211001120003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45257455 + ... + 45262116.

Almost surely, 2^211001120001 is an apocalyptic number.

211001120001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

211001120001 is a deficient number, since it is larger than the sum of its proper divisors (146732228543).

211001120001 is a wasteful number, since it uses less digits than its factorization.

211001120001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90519621 (or 90519618 counting only the distinct ones).

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

Adding to 211001120001 its reverse (100021100112), we get a palindrome (311022220113).

The spelling of 211001120001 in words is "two hundred eleven billion, one million, one hundred twenty thousand, one".