12221013061 has 2 divisors, whose sum is σ = 12221013062. Its totient is φ = 12221013060.

The previous prime is 12221013059. The next prime is 12221013067. The reversal of 12221013061 is 16031012221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12189484836 + 31528225 = 110406^2 + 5615^2 .

It is a cyclic number.

It is not a de Polignac number, because 12221013061 - 2¹ = 12221013059 is a prime.

Together with 12221013059, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12221013067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110506530 + 6110506531.

It is an arithmetic number, because the mean of its divisors is an integer number (6110506531).

Almost surely, 2^12221013061 is an apocalyptic number.

It is an amenable number.

12221013061 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221013061 is an equidigital number, since it uses as much as digits as its factorization.

12221013061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 12221013061 its reverse (16031012221), we get a palindrome (28252025282).

The spelling of 12221013061 in words is "twelve billion, two hundred twenty-one million, thirteen thousand, sixty-one".