221120110221977 has 2 divisors, whose sum is σ = 221120110221978. Its totient is φ = 221120110221976.

The previous prime is 221120110221961. The next prime is 221120110222031. The reversal of 221120110221977 is 779122011021122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184836967666576 + 36283142555401 = 13595476^2 + 6023549^2 .

It is a cyclic number.

It is not a de Polignac number, because 221120110221977 - 2⁴ = 221120110221961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221120110221977.

It is not a weakly prime, because it can be changed into another prime (221120110211977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110560055110988 + 110560055110989.

It is an arithmetic number, because the mean of its divisors is an integer number (110560055110989).

Almost surely, 2^{221120110221977} is an apocalyptic number.

It is an amenable number.

221120110221977 is a deficient number, since it is larger than the sum of its proper divisors (1).

221120110221977 is an equidigital number, since it uses as much as digits as its factorization.

221120110221977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 38.

The spelling of 221120110221977 in words is "two hundred twenty-one trillion, one hundred twenty billion, one hundred ten million, two hundred twenty-one thousand, nine hundred seventy-seven".