211122122100121 has 4 divisors (see below), whose sum is σ = 211167127886544. Its totient is φ = 211077116313700.

The previous prime is 211122122100119. The next prime is 211122122100139. The reversal of 211122122100121 is 121001221221112.

It is a happy number.

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 211122122100121 - 2¹ = 211122122100119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211122122100521) 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, 22502886175 + ... + 22502895556.

It is an arithmetic number, because the mean of its divisors is an integer number (52791781971636).

Almost surely, 2^{211122122100121} is an apocalyptic number.

It is an amenable number.

211122122100121 is a deficient number, since it is larger than the sum of its proper divisors (45005786423).

211122122100121 is an equidigital number, since it uses as much as digits as its factorization.

211122122100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45005786422.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211122122100121 its reverse (121001221221112), we get a palindrome (332123343321233).

The spelling of 211122122100121 in words is "two hundred eleven trillion, one hundred twenty-two billion, one hundred twenty-two million, one hundred thousand, one hundred twenty-one".