2123002121 has 8 divisors (see below), whose sum is σ = 2131671360. Its totient is φ = 2114350128.

The previous prime is 2123002117. The next prime is 2123002153. The reversal of 2123002121 is 1212003212.

It is a happy number.

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 2123002121 - 2² = 2123002117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2123002096 and 2123002105.

It is not an unprimeable number, because it can be changed into a prime (2123002621) 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, 279050 + ... + 286556.

It is an arithmetic number, because the mean of its divisors is an integer number (266458920).

Almost surely, 2^2123002121 is an apocalyptic number.

It is an amenable number.

2123002121 is a deficient number, since it is larger than the sum of its proper divisors (8669239).

2123002121 is an equidigital number, since it uses as much as digits as its factorization.

2123002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8623.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2123002121 is about 46076.0471503361. The cubic root of 2123002121 is about 1285.2377584454.

Adding to 2123002121 its reverse (1212003212), we get a palindrome (3335005333).

The spelling of 2123002121 in words is "two billion, one hundred twenty-three million, two thousand, one hundred twenty-one".