211192121 has 8 divisors (see below), whose sum is σ = 245916864. Its totient is φ = 177606000.

The previous prime is 211192117. The next prime is 211192199. The reversal of 211192121 is 121291112.

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 211192121 - 2² = 211192117 is a prime.

It is a super-2 number, since 2×211192121² = 89204223944957282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 211192093 and 211192102.

It is not an unprimeable number, because it can be changed into a prime (211192021) 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, 284255 + ... + 284996.

It is an arithmetic number, because the mean of its divisors is an integer number (30739608).

Almost surely, 2^211192121 is an apocalyptic number.

It is an amenable number.

211192121 is a deficient number, since it is larger than the sum of its proper divisors (34724743).

211192121 is an equidigital number, since it uses as much as digits as its factorization.

211192121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569311.

The product of its digits is 72, while the sum is 20.

The square root of 211192121 is about 14532.4506192177. The cubic root of 211192121 is about 595.5148155977.

The spelling of 211192121 in words is "two hundred eleven million, one hundred ninety-two thousand, one hundred twenty-one".