211313023121 has 16 divisors (see below), whose sum is σ = 223344000000. Its totient is φ = 199373731200.

The previous prime is 211313023111. The next prime is 211313023171. The reversal of 211313023121 is 121320313112.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211313023121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211313023093 and 211313023102.

It is not an unprimeable number, because it can be changed into a prime (211313023111) 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, 11261255 + ... + 11280003.

It is an arithmetic number, because the mean of its divisors is an integer number (13959000000).

Almost surely, 2^211313023121 is an apocalyptic number.

It is an amenable number.

211313023121 is a deficient number, since it is larger than the sum of its proper divisors (12030976879).

211313023121 is a wasteful number, since it uses less digits than its factorization.

211313023121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21160.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 211313023121 its reverse (121320313112), we get a palindrome (332633336233).

The spelling of 211313023121 in words is "two hundred eleven billion, three hundred thirteen million, twenty-three thousand, one hundred twenty-one".