613220121491 has 2 divisors, whose sum is σ = 613220121492. Its totient is φ = 613220121490.

The previous prime is 613220121473. The next prime is 613220121601. The reversal of 613220121491 is 194121022316.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 613220121491 - 2¹⁴ = 613220105107 is a prime.

It is not a weakly prime, because it can be changed into another prime (613220121191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306610060745 + 306610060746.

It is an arithmetic number, because the mean of its divisors is an integer number (306610060746).

Almost surely, 2^613220121491 is an apocalyptic number.

613220121491 is a deficient number, since it is larger than the sum of its proper divisors (1).

613220121491 is an equidigital number, since it uses as much as digits as its factorization.

613220121491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The spelling of 613220121491 in words is "six hundred thirteen billion, two hundred twenty million, one hundred twenty-one thousand, four hundred ninety-one".