77901121201 has 4 divisors (see below), whose sum is σ = 78091588900. Its totient is φ = 77710653504.

The previous prime is 77901121163. The next prime is 77901121213. The reversal of 77901121201 is 10212110977.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52723048225 + 25178072976 = 229615^2 + 158676^2 .

It is a cyclic number.

It is not a de Polignac number, because 77901121201 - 2⁷ = 77901121073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77901121241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95233236 + ... + 95234053.

It is an arithmetic number, because the mean of its divisors is an integer number (19522897225).

Almost surely, 2^77901121201 is an apocalyptic number.

It is an amenable number.

77901121201 is a deficient number, since it is larger than the sum of its proper divisors (190467699).

77901121201 is a wasteful number, since it uses less digits than its factorization.

77901121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190467698.

The product of its (nonzero) digits is 1764, while the sum is 31.

The spelling of 77901121201 in words is "seventy-seven billion, nine hundred one million, one hundred twenty-one thousand, two hundred one".