211212211001001 has 32 divisors (see below), whose sum is σ = 325733458434048. Its totient is φ = 119235413902080.

The previous prime is 211212211000991. The next prime is 211212211001017. The reversal of 211212211001001 is 100100112212112.

It is a happy number.

It is not a de Polignac number, because 211212211001001 - 2¹⁵ = 211212210968233 is a prime.

It is a super-2 number, since 2×211212211001001² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211212211001101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65212420 + ... + 68374586.

It is an arithmetic number, because the mean of its divisors is an integer number (10179170576064).

Almost surely, 2^{211212211001001} is an apocalyptic number.

211212211001001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

211212211001001 is a deficient number, since it is larger than the sum of its proper divisors (114521247433047).

211212211001001 is a wasteful number, since it uses less digits than its factorization.

211212211001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3200581.

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

Adding to 211212211001001 its reverse (100100112212112), we get a palindrome (311312323213113).

The spelling of 211212211001001 in words is "two hundred eleven trillion, two hundred twelve billion, two hundred eleven million, one thousand, one".