211544145235121 has 16 divisors (see below), whose sum is σ = 214223255003520. Its totient is φ = 208868179125120.

The previous prime is 211544145235099. The next prime is 211544145235237. The reversal of 211544145235121 is 121532541445112.

It is a cyclic number.

It is not a de Polignac number, because 211544145235121 - 2²⁶ = 211544078126257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211544145735121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 908925956 + ... + 909158666.

It is an arithmetic number, because the mean of its divisors is an integer number (13388953437720).

Almost surely, 2^{211544145235121} is an apocalyptic number.

It is an amenable number.

211544145235121 is a deficient number, since it is larger than the sum of its proper divisors (2679109768399).

211544145235121 is a wasteful number, since it uses less digits than its factorization.

211544145235121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239416.

The product of its digits is 192000, while the sum is 41.

The spelling of 211544145235121 in words is "two hundred eleven trillion, five hundred forty-four billion, one hundred forty-five million, two hundred thirty-five thousand, one hundred twenty-one".