211238121 has 8 divisors (see below), whose sum is σ = 281727360. Its totient is φ = 140787152.

The previous prime is 211238119. The next prime is 211238149. The reversal of 211238121 is 121832112.

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 211238121 - 2¹ = 211238119 is a prime.

It is a super-2 number, since 2×211238121² = 89243087527221282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211238101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7840 + ... + 21998.

It is an arithmetic number, because the mean of its divisors is an integer number (35215920).

Almost surely, 2^211238121 is an apocalyptic number.

It is an amenable number.

211238121 is a deficient number, since it is larger than the sum of its proper divisors (70489239).

211238121 is a wasteful number, since it uses less digits than its factorization.

211238121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19135.

The product of its digits is 192, while the sum is 21.

The square root of 211238121 is about 14534.0331979805. The cubic root of 211238121 is about 595.5580490490.

The spelling of 211238121 in words is "two hundred eleven million, two hundred thirty-eight thousand, one hundred twenty-one".