12021211177 has 2 divisors, whose sum is σ = 12021211178. Its totient is φ = 12021211176.

The previous prime is 12021211159. The next prime is 12021211219. The reversal of 12021211177 is 77111212021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6594089616 + 5427121561 = 81204^2 + 73669^2 .

It is an emirp because it is prime and its reverse (77111212021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12021211177 - 2¹⁵ = 12021178409 is a prime.

It is not a weakly prime, because it can be changed into another prime (12021211117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010605588 + 6010605589.

It is an arithmetic number, because the mean of its divisors is an integer number (6010605589).

Almost surely, 2^12021211177 is an apocalyptic number.

It is an amenable number.

12021211177 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021211177 is an equidigital number, since it uses as much as digits as its factorization.

12021211177 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 392, while the sum is 25.

Adding to 12021211177 its reverse (77111212021), we get a palindrome (89132423198).

The spelling of 12021211177 in words is "twelve billion, twenty-one million, two hundred eleven thousand, one hundred seventy-seven".