211212212001001 has 4 divisors (see below), whose sum is σ = 222328644211600. Its totient is φ = 200095779790404.

The previous prime is 211212212000983. The next prime is 211212212001053. The reversal of 211212212001001 is 100100212212112.

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 211212212001001 - 2⁵ = 211212212000969 is a prime.

It is a super-2 number, since 2×211212212001001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211212212001101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5558216105271 + ... + 5558216105308.

It is an arithmetic number, because the mean of its divisors is an integer number (55582161052900).

Almost surely, 2^{211212212001001} is an apocalyptic number.

It is an amenable number.

211212212001001 is a deficient number, since it is larger than the sum of its proper divisors (11116432210599).

211212212001001 is a wasteful number, since it uses less digits than its factorization.

211212212001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11116432210598.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211212212001001 its reverse (100100212212112), we get a palindrome (311312424213113).

The spelling of 211212212001001 in words is "two hundred eleven trillion, two hundred twelve billion, two hundred twelve million, one thousand, one".