2152142121 has 8 divisors (see below), whose sum is σ = 2875417024. Its totient is φ = 1431814320.

The previous prime is 2152142119. The next prime is 2152142123. The reversal of 2152142121 is 1212412512.

It is an interprime number because it is at equal distance from previous prime (2152142119) and next prime (2152142123).

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

It is not a de Polignac number, because 2152142121 - 2¹ = 2152142119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2152142123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 735070 + ... + 737991.

It is an arithmetic number, because the mean of its divisors is an integer number (359427128).

Almost surely, 2^2152142121 is an apocalyptic number.

It is an amenable number.

2152142121 is a deficient number, since it is larger than the sum of its proper divisors (723274903).

2152142121 is a wasteful number, since it uses less digits than its factorization.

2152142121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1473551.

The product of its digits is 320, while the sum is 21.

The square root of 2152142121 is about 46391.1858115311. The cubic root of 2152142121 is about 1291.0913827454.

Adding to 2152142121 its reverse (1212412512), we get a palindrome (3364554633).

The spelling of 2152142121 in words is "two billion, one hundred fifty-two million, one hundred forty-two thousand, one hundred twenty-one".