612127121 has 4 divisors (see below), whose sum is σ = 612979200. Its totient is φ = 611275044.

The previous prime is 612127091. The next prime is 612127127. The reversal of 612127121 is 121721216.

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 a cyclic number.

It is not a de Polignac number, because 612127121 - 2⁶ = 612127057 is a prime.

It is a super-2 number, since 2×612127121² = 749399224527497282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (612127127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 424961 + ... + 426398.

It is an arithmetic number, because the mean of its divisors is an integer number (153244800).

Almost surely, 2^612127121 is an apocalyptic number.

It is an amenable number.

612127121 is a deficient number, since it is larger than the sum of its proper divisors (852079).

612127121 is an equidigital number, since it uses as much as digits as its factorization.

612127121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852078.

The product of its digits is 336, while the sum is 23.

The square root of 612127121 is about 24741.2029012334. The cubic root of 612127121 is about 849.0772551639.

Adding to 612127121 its reverse (121721216), we get a palindrome (733848337).

The spelling of 612127121 in words is "six hundred twelve million, one hundred twenty-seven thousand, one hundred twenty-one".