211212012011001 has 4 divisors (see below), whose sum is σ = 281616016014672. Its totient is φ = 140808008007332.

The previous prime is 211212012010981. The next prime is 211212012011059. The reversal of 211212012011001 is 100110210212112.

It is a happy number.

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 211212012011001 - 2¹⁴ = 211212011994617 is a prime.

It is a super-2 number, since 2×211212012011001² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211212012011501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35202002001831 + ... + 35202002001836.

It is an arithmetic number, because the mean of its divisors is an integer number (70404004003668).

Almost surely, 2^{211212012011001} is an apocalyptic number.

It is an amenable number.

211212012011001 is a deficient number, since it is larger than the sum of its proper divisors (70404004003671).

211212012011001 is an equidigital number, since it uses as much as digits as its factorization.

211212012011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70404004003670.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 211212012011001 its reverse (100110210212112), we get a palindrome (311322222223113).

The spelling of 211212012011001 in words is "two hundred eleven trillion, two hundred twelve billion, twelve million, eleven thousand, one".