211312121030121 has 4 divisors (see below), whose sum is σ = 281749494706832. Its totient is φ = 140874747353412.

The previous prime is 211312121030111. The next prime is 211312121030209. The reversal of 211312121030121 is 121030121213112.

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 not a de Polignac number, because 211312121030121 - 2⁶ = 211312121030057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211312121030111) 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, 35218686838351 + ... + 35218686838356.

It is an arithmetic number, because the mean of its divisors is an integer number (70437373676708).

Almost surely, 2^{211312121030121} is an apocalyptic number.

It is an amenable number.

211312121030121 is a deficient number, since it is larger than the sum of its proper divisors (70437373676711).

211312121030121 is an equidigital number, since it uses as much as digits as its factorization.

211312121030121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70437373676710.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 211312121030121 its reverse (121030121213112), we get a palindrome (332342242243233).

The spelling of 211312121030121 in words is "two hundred eleven trillion, three hundred twelve billion, one hundred twenty-one million, thirty thousand, one hundred twenty-one".