211013121 has 16 divisors (see below), whose sum is σ = 310097088. Its totient is φ = 126566400.

The previous prime is 211013119. The next prime is 211013147. The reversal of 211013121 is 121310112.

It is not a de Polignac number, because 211013121 - 2¹ = 211013119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211013097 and 211013106.

It is not an unprimeable number, because it can be changed into a prime (211013161) 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, 29760 + ... + 36161.

It is an arithmetic number, because the mean of its divisors is an integer number (19381068).

Almost surely, 2^211013121 is an apocalyptic number.

It is an amenable number.

211013121 is a deficient number, since it is larger than the sum of its proper divisors (99083967).

211013121 is a wasteful number, since it uses less digits than its factorization.

211013121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66032.

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

The square root of 211013121 is about 14526.2906827586. The cubic root of 211013121 is about 595.3465213106.

Adding to 211013121 its reverse (121310112), we get a palindrome (332323233).

The spelling of 211013121 in words is "two hundred eleven million, thirteen thousand, one hundred twenty-one".