2011000221977 has 2 divisors, whose sum is σ = 2011000221978. Its totient is φ = 2011000221976.

The previous prime is 2011000221949. The next prime is 2011000222009. The reversal of 2011000221977 is 7791220001102.

It is an a-pointer prime, because the next prime (2011000222009) can be obtained adding 2011000221977 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1927157544841 + 83842677136 = 1388221^2 + 289556^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011000221977 - 2¹⁸ = 2010999959833 is a prime.

It is not a weakly prime, because it can be changed into another prime (2011000221077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005500110988 + 1005500110989.

It is an arithmetic number, because the mean of its divisors is an integer number (1005500110989).

Almost surely, 2^{2011000221977} is an apocalyptic number.

It is an amenable number.

2011000221977 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011000221977 is an equidigital number, since it uses as much as digits as its factorization.

2011000221977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 32.

The spelling of 2011000221977 in words is "two trillion, eleven billion, two hundred twenty-one thousand, nine hundred seventy-seven".