211211401 has 8 divisors (see below), whose sum is σ = 219473408. Its totient is φ = 203040000.

The previous prime is 211211381. The next prime is 211211419. The reversal of 211211401 is 104112112.

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

It is a cyclic number.

It is not a de Polignac number, because 211211401 - 2⁹ = 211210889 is a prime.

It is a super-2 number, since 2×211211401² = 89220511824765602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211211701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17880 + ... + 27241.

It is an arithmetic number, because the mean of its divisors is an integer number (27434176).

Almost surely, 2^211211401 is an apocalyptic number.

It is an amenable number.

211211401 is a deficient number, since it is larger than the sum of its proper divisors (8262007).

211211401 is a wasteful number, since it uses less digits than its factorization.

211211401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45303.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 211211401 is about 14533.1139471209. The cubic root of 211211401 is about 595.5329368171.

Adding to 211211401 its reverse (104112112), we get a palindrome (315323513).

It can be divided in two parts, 21121 and 1401, that added together give a palindrome (22522).

The spelling of 211211401 in words is "two hundred eleven million, two hundred eleven thousand, four hundred one".