12221109977 has 2 divisors, whose sum is σ = 12221109978. Its totient is φ = 12221109976.

The previous prime is 12221109941. The next prime is 12221110021. The reversal of 12221109977 is 77990112221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8630224201 + 3590885776 = 92899^2 + 59924^2 .

It is a cyclic number.

It is not a de Polignac number, because 12221109977 - 2⁶ = 12221109913 is a prime.

It is not a weakly prime, because it can be changed into another prime (12221309977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110554988 + 6110554989.

It is an arithmetic number, because the mean of its divisors is an integer number (6110554989).

Almost surely, 2^12221109977 is an apocalyptic number.

It is an amenable number.

12221109977 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221109977 is an equidigital number, since it uses as much as digits as its factorization.

12221109977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 41.

The spelling of 12221109977 in words is "twelve billion, two hundred twenty-one million, one hundred nine thousand, nine hundred seventy-seven".