202220221220077 has 2 divisors, whose sum is σ = 202220221220078. Its totient is φ = 202220221220076.

The previous prime is 202220221220027. The next prime is 202220221220089. The reversal of 202220221220077 is 770022122022202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140154012659556 + 62066208560521 = 11838666^2 + 7878211^2 .

It is a cyclic number.

It is not a de Polignac number, because 202220221220077 - 2³¹ = 202218073736429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202220221220027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101110110610038 + 101110110610039.

It is an arithmetic number, because the mean of its divisors is an integer number (101110110610039).

Almost surely, 2^{202220221220077} is an apocalyptic number.

It is an amenable number.

202220221220077 is a deficient number, since it is larger than the sum of its proper divisors (1).

202220221220077 is an equidigital number, since it uses as much as digits as its factorization.

202220221220077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12544, while the sum is 31.

Adding to 202220221220077 its reverse (770022122022202), we get a palindrome (972242343242279).

The spelling of 202220221220077 in words is "two hundred two trillion, two hundred twenty billion, two hundred twenty-one million, two hundred twenty thousand, seventy-seven".