211211120021001 has 8 divisors (see below), whose sum is σ = 281616170468544. Its totient is φ = 140806741460400.

The previous prime is 211211120020963. The next prime is 211211120021003. The reversal of 211211120021001 is 100120021112112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 211211120021001 - 2¹⁸ = 211211119758857 is a prime.

It is a super-2 number, since 2×211211120021001² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211211120021003) 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 7 ways as a sum of consecutive naturals, for example, 167237781 + ... + 168495986.

It is an arithmetic number, because the mean of its divisors is an integer number (35202021308568).

Almost surely, 2^{211211120021001} is an apocalyptic number.

It is an amenable number.

211211120021001 is a deficient number, since it is larger than the sum of its proper divisors (70405050447543).

211211120021001 is a wasteful number, since it uses less digits than its factorization.

211211120021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335943471.

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

Adding to 211211120021001 its reverse (100120021112112), we get a palindrome (311331141133113).

The spelling of 211211120021001 in words is "two hundred eleven trillion, two hundred eleven billion, one hundred twenty million, twenty-one thousand, one".