211406121 has 12 divisors (see below), whose sum is σ = 309666240. Its totient is φ = 138951960.

The previous prime is 211406119. The next prime is 211406149. The reversal of 211406121 is 121604112.

211406121 is a `hidden beast` number, since 2 + 11 + 40 + 612 + 1 = 666.

211406121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 211406121 - 2¹ = 211406119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211406094 and 211406103.

It is not an unprimeable number, because it can be changed into a prime (211406021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 164781 + ... + 166058.

It is an arithmetic number, because the mean of its divisors is an integer number (25805520).

Almost surely, 2^211406121 is an apocalyptic number.

It is an amenable number.

211406121 is a deficient number, since it is larger than the sum of its proper divisors (98260119).

211406121 is a wasteful number, since it uses less digits than its factorization.

211406121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330916 (or 330913 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 211406121 is about 14539.8115875000. The cubic root of 211406121 is about 595.7158918331.

It can be divided in two parts, 21140 and 6121, that added together give a triangular number (27261 = T₂₃₃).

The spelling of 211406121 in words is "two hundred eleven million, four hundred six thousand, one hundred twenty-one".