211022210121 has 4 divisors (see below), whose sum is σ = 281362946832. Its totient is φ = 140681473412.

The previous prime is 211022210117. The next prime is 211022210159. The reversal of 211022210121 is 121012220112.

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 211022210121 - 2² = 211022210117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211022210121.

It is not an unprimeable number, because it can be changed into a prime (211022210171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35170368351 + ... + 35170368356.

It is an arithmetic number, because the mean of its divisors is an integer number (70340736708).

Almost surely, 2^211022210121 is an apocalyptic number.

It is an amenable number.

211022210121 is a deficient number, since it is larger than the sum of its proper divisors (70340736711).

211022210121 is an equidigital number, since it uses as much as digits as its factorization.

211022210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70340736710.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 211022210121 its reverse (121012220112), we get a palindrome (332034430233).

Subtracting from 211022210121 its reverse (121012220112), we obtain a palindrome (90009990009).

The spelling of 211022210121 in words is "two hundred eleven billion, twenty-two million, two hundred ten thousand, one hundred twenty-one".