61220335213 has 16 divisors (see below), whose sum is σ = 67105580544. Its totient is φ = 55599598080.

The previous prime is 61220335199. The next prime is 61220335229. The reversal of 61220335213 is 31253302216.

It is a cyclic number.

It is not a de Polignac number, because 61220335213 - 2²⁹ = 60683464301 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 (61220332213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15481 + ... + 350257.

It is an arithmetic number, because the mean of its divisors is an integer number (4194098784).

Almost surely, 2^61220335213 is an apocalyptic number.

It is an amenable number.

61220335213 is a deficient number, since it is larger than the sum of its proper divisors (5885245331).

61220335213 is a wasteful number, since it uses less digits than its factorization.

61220335213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335172.

The product of its (nonzero) digits is 6480, while the sum is 28.

Adding to 61220335213 its reverse (31253302216), we get a palindrome (92473637429).

The spelling of 61220335213 in words is "sixty-one billion, two hundred twenty million, three hundred thirty-five thousand, two hundred thirteen".