1230002121 has 4 divisors (see below), whose sum is σ = 1640002832. Its totient is φ = 820001412.

The previous prime is 1230002117. The next prime is 1230002141. The reversal of 1230002121 is 1212000321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1230002121 - 2² = 1230002117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1230002097 and 1230002106.

It is not an unprimeable number, because it can be changed into a prime (1230002101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205000351 + ... + 205000356.

It is an arithmetic number, because the mean of its divisors is an integer number (410000708).

Almost surely, 2^1230002121 is an apocalyptic number.

It is an amenable number.

1230002121 is a deficient number, since it is larger than the sum of its proper divisors (410000711).

1230002121 is an equidigital number, since it uses as much as digits as its factorization.

1230002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410000710.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1230002121 is about 35071.3860718392. The cubic root of 1230002121 is about 1071.4418855514.

Adding to 1230002121 its reverse (1212000321), we get a palindrome (2442002442).

The spelling of 1230002121 in words is "one billion, two hundred thirty million, two thousand, one hundred twenty-one".