211220121141243 has 6 divisors (see below), whose sum is σ = 305095730537364. Its totient is φ = 140813414094156.

The previous prime is 211220121141241. The next prime is 211220121141247. The reversal of 211220121141243 is 342141121022112.

211220121141243 is a `hidden beast` number, since 2 + 1 + 1 + 2 + 201 + 2 + 1 + 1 + 412 + 43 = 666.

It is not a de Polignac number, because 211220121141243 - 2¹ = 211220121141241 is a prime.

It is a super-2 number, since 2×211220121141243² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211220121141241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11734451174505 + ... + 11734451174522.

It is an arithmetic number, because the mean of its divisors is an integer number (50849288422894).

Almost surely, 2^{211220121141243} is an apocalyptic number.

211220121141243 is a deficient number, since it is larger than the sum of its proper divisors (93875609396121).

211220121141243 is a wasteful number, since it uses less digits than its factorization.

211220121141243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23468902349033 (or 23468902349030 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

Adding to 211220121141243 its reverse (342141121022112), we get a palindrome (553361242163355).

The spelling of 211220121141243 in words is "two hundred eleven trillion, two hundred twenty billion, one hundred twenty-one million, one hundred forty-one thousand, two hundred forty-three".