77221454111 has 2 divisors, whose sum is σ = 77221454112. Its totient is φ = 77221454110.

The previous prime is 77221454053. The next prime is 77221454129. The reversal of 77221454111 is 11145412277.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (11145412277) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77221454111 - 2¹⁰ = 77221453087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77221414111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38610727055 + 38610727056.

It is an arithmetic number, because the mean of its divisors is an integer number (38610727056).

Almost surely, 2^77221454111 is an apocalyptic number.

77221454111 is a deficient number, since it is larger than the sum of its proper divisors (1).

77221454111 is an equidigital number, since it uses as much as digits as its factorization.

77221454111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15680, while the sum is 35.

Adding to 77221454111 its reverse (11145412277), we get a palindrome (88366866388).

The spelling of 77221454111 in words is "seventy-seven billion, two hundred twenty-one million, four hundred fifty-four thousand, one hundred eleven".