211021201121 has 4 divisors (see below), whose sum is σ = 211145406000. Its totient is φ = 210896996244.

The previous prime is 211021201091. The next prime is 211021201283. The reversal of 211021201121 is 121102120112.

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 a de Polignac number, because none of the positive numbers 2^k-211021201121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211021201096 and 211021201105.

It is not an unprimeable number, because it can be changed into a prime (211021200121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62099891 + ... + 62103288.

It is an arithmetic number, because the mean of its divisors is an integer number (52786351500).

Almost surely, 2^211021201121 is an apocalyptic number.

It is an amenable number.

211021201121 is a deficient number, since it is larger than the sum of its proper divisors (124204879).

211021201121 is a wasteful number, since it uses less digits than its factorization.

211021201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124204878.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 211021201121 its reverse (121102120112), we get a palindrome (332123321233).

The spelling of 211021201121 in words is "two hundred eleven billion, twenty-one million, two hundred one thousand, one hundred twenty-one".