211110021121 has 4 divisors (see below), whose sum is σ = 212374153152. Its totient is φ = 209845889092.

The previous prime is 211110021103. The next prime is 211110021131. The reversal of 211110021121 is 121120011112.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211110021121 - 2¹¹ = 211110019073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211110021131) 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 3 ways as a sum of consecutive naturals, for example, 632065765 + ... + 632066098.

It is an arithmetic number, because the mean of its divisors is an integer number (53093538288).

Almost surely, 2^211110021121 is an apocalyptic number.

It is an amenable number.

211110021121 is a deficient number, since it is larger than the sum of its proper divisors (1264132031).

211110021121 is a wasteful number, since it uses less digits than its factorization.

211110021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264132030.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 211110021121 its reverse (121120011112), we get a palindrome (332230032233).

The spelling of 211110021121 in words is "two hundred eleven billion, one hundred ten million, twenty-one thousand, one hundred twenty-one".