211000121123 has 16 divisors (see below), whose sum is σ = 235557628416. Its totient is φ = 187339417440.

The previous prime is 211000121081. The next prime is 211000121131. The reversal of 211000121123 is 321121000112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211000121123 is a prime.

It is a super-2 number, since 2×211000121123² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211000121098 and 211000121107.

It is not an unprimeable number, because it can be changed into a prime (211000121323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8455661 + ... + 8480577.

It is an arithmetic number, because the mean of its divisors is an integer number (14722351776).

Almost surely, 2^211000121123 is an apocalyptic number.

211000121123 is a deficient number, since it is larger than the sum of its proper divisors (24557507293).

211000121123 is a wasteful number, since it uses less digits than its factorization.

211000121123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42874.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 211000121123 its reverse (321121000112), we get a palindrome (532121121235).

The spelling of 211000121123 in words is "two hundred eleven billion, one hundred twenty-one thousand, one hundred twenty-three".