2121303121 has 8 divisors (see below), whose sum is σ = 2464090304. Its totient is φ = 1788451920.

The previous prime is 2121303113. The next prime is 2121303137. The reversal of 2121303121 is 1213031212.

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

It is a cyclic number.

It is not a de Polignac number, because 2121303121 - 2³ = 2121303113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121303095 and 2121303104.

It is not an unprimeable number, because it can be changed into a prime (2121303421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2483535 + ... + 2484388.

It is an arithmetic number, because the mean of its divisors is an integer number (308011288).

Almost surely, 2^2121303121 is an apocalyptic number.

It is an amenable number.

2121303121 is a deficient number, since it is larger than the sum of its proper divisors (342787183).

2121303121 is an equidigital number, since it uses as much as digits as its factorization.

2121303121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4967991.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2121303121 is about 46057.6065487559. The cubic root of 2121303121 is about 1284.8948161417.

Adding to 2121303121 its reverse (1213031212), we get a palindrome (3334334333).

It can be divided in two parts, 2 and 121303121, that multiplied together give a palindrome (242606242).

The spelling of 2121303121 in words is "two billion, one hundred twenty-one million, three hundred three thousand, one hundred twenty-one".