221120110211977 has 2 divisors, whose sum is σ = 221120110211978. Its totient is φ = 221120110211976.

The previous prime is 221120110211813. The next prime is 221120110211981. The reversal of 221120110211977 is 779112011021122.

221120110211977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221071578562576 + 48531649401 = 14868476^2 + 220299^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221120110211977 is a prime.

It is not a weakly prime, because it can be changed into another prime (221120110211177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110560055105988 + 110560055105989.

It is an arithmetic number, because the mean of its divisors is an integer number (110560055105989).

Almost surely, 2^{221120110211977} is an apocalyptic number.

It is an amenable number.

221120110211977 is a deficient number, since it is larger than the sum of its proper divisors (1).

221120110211977 is an equidigital number, since it uses as much as digits as its factorization.

221120110211977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 37.

The spelling of 221120110211977 in words is "two hundred twenty-one trillion, one hundred twenty billion, one hundred ten million, two hundred eleven thousand, nine hundred seventy-seven".