77221102102 has 24 divisors (see below), whose sum is σ = 117241938000. Its totient is φ = 38142793728.

The previous prime is 77221102099. The next prime is 77221102163. The reversal of 77221102102 is 20120112277.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100417174 + ... + 100417942.

It is an arithmetic number, because the mean of its divisors is an integer number (4885080750).

Almost surely, 2^77221102102 is an apocalyptic number.

77221102102 is a deficient number, since it is larger than the sum of its proper divisors (40020835898).

77221102102 is an equidigital number, since it uses as much as digits as its factorization.

77221102102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2248 (or 1479 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 25.

Adding to 77221102102 its reverse (20120112277), we get a palindrome (97341214379).

The spelling of 77221102102 in words is "seventy-seven billion, two hundred twenty-one million, one hundred two thousand, one hundred two".