2121142271 has 8 divisors (see below), whose sum is σ = 2214670560. Its totient is φ = 2027722752.

The previous prime is 2121142249. The next prime is 2121142279. The reversal of 2121142271 is 1722411212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121142271 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121142279) 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 7 ways as a sum of consecutive naturals, for example, 14015 + ... + 66623.

It is an arithmetic number, because the mean of its divisors is an integer number (276833820).

Almost surely, 2^2121142271 is an apocalyptic number.

2121142271 is a deficient number, since it is larger than the sum of its proper divisors (93528289).

2121142271 is a wasteful number, since it uses less digits than its factorization.

2121142271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54385.

The product of its digits is 448, while the sum is 23.

The square root of 2121142271 is about 46055.8603328610. The cubic root of 2121142271 is about 1284.8623391620.

Adding to 2121142271 its reverse (1722411212), we get a palindrome (3843553483).

The spelling of 2121142271 in words is "two billion, one hundred twenty-one million, one hundred forty-two thousand, two hundred seventy-one".