2321219977 has 2 divisors, whose sum is σ = 2321219978. Its totient is φ = 2321219976.

The previous prime is 2321219903. The next prime is 2321219981. The reversal of 2321219977 is 7799121232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2313513801 + 7706176 = 48099^2 + 2776^2 .

It is a cyclic number.

It is not a de Polignac number, because 2321219977 - 2²³ = 2312831369 is a prime.

It is not a weakly prime, because it can be changed into another prime (2321289977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1160609988 + 1160609989.

It is an arithmetic number, because the mean of its divisors is an integer number (1160609989).

Almost surely, 2^2321219977 is an apocalyptic number.

It is an amenable number.

2321219977 is a deficient number, since it is larger than the sum of its proper divisors (1).

2321219977 is an equidigital number, since it uses as much as digits as its factorization.

2321219977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95256, while the sum is 43.

The square root of 2321219977 is about 48179.0408476549. The cubic root of 2321219977 is about 1324.0531936853.

The spelling of 2321219977 in words is "two billion, three hundred twenty-one million, two hundred nineteen thousand, nine hundred seventy-seven".