211211020001 has 4 divisors (see below), whose sum is σ = 211227892992. Its totient is φ = 211194147012.

The previous prime is 211211019967. The next prime is 211211020003. The reversal of 211211020001 is 100020112112.

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 211211020001 - 2⁶ = 211211019937 is a prime.

It is a super-2 number, since 2×211211020001² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (211211020003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8417705 + ... + 8442758.

It is an arithmetic number, because the mean of its divisors is an integer number (52806973248).

Almost surely, 2^211211020001 is an apocalyptic number.

It is an amenable number.

211211020001 is a deficient number, since it is larger than the sum of its proper divisors (16872991).

211211020001 is a wasteful number, since it uses less digits than its factorization.

211211020001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16872990.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 211211020001 its reverse (100020112112), we get a palindrome (311231132113).

The spelling of 211211020001 in words is "two hundred eleven billion, two hundred eleven million, twenty thousand, one".