211102020121 has 4 divisors (see below), whose sum is σ = 215593552512. Its totient is φ = 206610487732.

The previous prime is 211102020089. The next prime is 211102020127. The reversal of 211102020121 is 121020201112.

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 211102020121 - 2⁵ = 211102020089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211102020127) 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, 2245766125 + ... + 2245766218.

It is an arithmetic number, because the mean of its divisors is an integer number (53898388128).

Almost surely, 2^211102020121 is an apocalyptic number.

It is an amenable number.

211102020121 is a deficient number, since it is larger than the sum of its proper divisors (4491532391).

211102020121 is an equidigital number, since it uses as much as digits as its factorization.

211102020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4491532390.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 211102020121 its reverse (121020201112), we get a palindrome (332122221233).

The spelling of 211102020121 in words is "two hundred eleven billion, one hundred two million, twenty thousand, one hundred twenty-one".