612146299221 has 12 divisors (see below), whose sum is σ = 904774375648. Its totient is φ = 398606892264.

The previous prime is 612146299207. The next prime is 612146299223. The reversal of 612146299221 is 122992641216.

612146299221 is a `hidden beast` number, since 6 + 1 + 2 + 14 + 629 + 9 + 2 + 2 + 1 = 666.

It is not a de Polignac number, because 612146299221 - 2⁵ = 612146299189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612146299223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 790886305 + ... + 790887078.

Almost surely, 2^612146299221 is an apocalyptic number.

It is an amenable number.

612146299221 is a deficient number, since it is larger than the sum of its proper divisors (292628076427).

612146299221 is a wasteful number, since it uses less digits than its factorization.

612146299221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581773432 (or 1581773429 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The spelling of 612146299221 in words is "six hundred twelve billion, one hundred forty-six million, two hundred ninety-nine thousand, two hundred twenty-one".