61220335229 has 2 divisors, whose sum is σ = 61220335230. Its totient is φ = 61220335228.

The previous prime is 61220335199. The next prime is 61220335339. The reversal of 61220335229 is 92253302216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36481764004 + 24738571225 = 191002^2 + 157285^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61220335229 is a prime.

It is a super-2 number, since 2×61220335229² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61220335829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30610167614 + 30610167615.

It is an arithmetic number, because the mean of its divisors is an integer number (30610167615).

Almost surely, 2^61220335229 is an apocalyptic number.

It is an amenable number.

61220335229 is a deficient number, since it is larger than the sum of its proper divisors (1).

61220335229 is an equidigital number, since it uses as much as digits as its factorization.

61220335229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 35.

The spelling of 61220335229 in words is "sixty-one billion, two hundred twenty million, three hundred thirty-five thousand, two hundred twenty-nine".