211000220121 has 16 divisors (see below), whose sum is σ = 281927044800. Its totient is φ = 140370413568.

The previous prime is 211000220113. The next prime is 211000220131. The reversal of 211000220121 is 121022000112.

211000220121 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 211000220121 - 2³ = 211000220113 is a prime.

It is a super-2 number, since 2×211000220121² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 211000220097 and 211000220106.

It is not an unprimeable number, because it can be changed into a prime (211000220131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2763385 + ... + 2838713.

It is an arithmetic number, because the mean of its divisors is an integer number (17620440300).

Almost surely, 2^211000220121 is an apocalyptic number.

It is an amenable number.

211000220121 is a deficient number, since it is larger than the sum of its proper divisors (70926824679).

211000220121 is a wasteful number, since it uses less digits than its factorization.

211000220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77288.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 211000220121 its reverse (121022000112), we get a palindrome (332022220233).

The spelling of 211000220121 in words is "two hundred eleven billion, two hundred twenty thousand, one hundred twenty-one".