1220222021077 has 2 divisors, whose sum is σ = 1220222021078. Its totient is φ = 1220222021076.

The previous prime is 1220222021003. The next prime is 1220222021131. The reversal of 1220222021077 is 7701202220221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1075035111921 + 145186909156 = 1036839^2 + 381034^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220222021077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220222051077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610111010538 + 610111010539.

It is an arithmetic number, because the mean of its divisors is an integer number (610111010539).

Almost surely, 2^{1220222021077} is an apocalyptic number.

It is an amenable number.

1220222021077 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220222021077 is an equidigital number, since it uses as much as digits as its factorization.

1220222021077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3136, while the sum is 28.

Adding to 1220222021077 its reverse (7701202220221), we get a palindrome (8921424241298).

The spelling of 1220222021077 in words is "one trillion, two hundred twenty billion, two hundred twenty-two million, twenty-one thousand, seventy-seven".