2677971221 has 2 divisors, whose sum is σ = 2677971222. Its totient is φ = 2677971220.

The previous prime is 2677971209. The next prime is 2677971269. The reversal of 2677971221 is 1221797762.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1451991025 + 1225980196 = 38105^2 + 35014^2 .

It is a cyclic number.

It is not a de Polignac number, because 2677971221 - 2¹⁸ = 2677709077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2677971281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1338985610 + 1338985611.

It is an arithmetic number, because the mean of its divisors is an integer number (1338985611).

Almost surely, 2^2677971221 is an apocalyptic number.

It is an amenable number.

2677971221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2677971221 is an equidigital number, since it uses as much as digits as its factorization.

2677971221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 148176, while the sum is 44.

The square root of 2677971221 is about 51749.1180697797. The cubic root of 2677971221 is about 1388.6793212949.

The spelling of 2677971221 in words is "two billion, six hundred seventy-seven million, nine hundred seventy-one thousand, two hundred twenty-one".