211222100121 has 4 divisors (see below), whose sum is σ = 281629466832. Its totient is φ = 140814733412.

The previous prime is 211222100113. The next prime is 211222100129. The reversal of 211222100121 is 121001222112.

211222100121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an interprime number because it is at equal distance from previous prime (211222100113) and next prime (211222100129).

It is a cyclic number.

It is not a de Polignac number, because 211222100121 - 2³ = 211222100113 is a prime.

It is a super-2 number, since 2×211222100121² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211222100121.

It is not an unprimeable number, because it can be changed into a prime (211222100129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35203683351 + ... + 35203683356.

It is an arithmetic number, because the mean of its divisors is an integer number (70407366708).

Almost surely, 2^211222100121 is an apocalyptic number.

It is an amenable number.

211222100121 is a deficient number, since it is larger than the sum of its proper divisors (70407366711).

211222100121 is an equidigital number, since it uses as much as digits as its factorization.

211222100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70407366710.

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

Adding to 211222100121 its reverse (121001222112), we get a palindrome (332223322233).

The spelling of 211222100121 in words is "two hundred eleven billion, two hundred twenty-two million, one hundred thousand, one hundred twenty-one".