612214021 has 2 divisors, whose sum is σ = 612214022. Its totient is φ = 612214020.

The previous prime is 612214003. The next prime is 612214027. The reversal of 612214021 is 120412216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 450033796 + 162180225 = 21214^2 + 12735^2 .

It is a cyclic number.

It is not a de Polignac number, because 612214021 - 2⁹ = 612213509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 612214021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612214027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306107010 + 306107011.

It is an arithmetic number, because the mean of its divisors is an integer number (306107011).

Almost surely, 2^612214021 is an apocalyptic number.

It is an amenable number.

612214021 is a deficient number, since it is larger than the sum of its proper divisors (1).

612214021 is an equidigital number, since it uses as much as digits as its factorization.

612214021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 612214021 is about 24742.9590186784. The cubic root of 612214021 is about 849.1174327237.

Adding to 612214021 its reverse (120412216), we get a palindrome (732626237).

The spelling of 612214021 in words is "six hundred twelve million, two hundred fourteen thousand, twenty-one".