101220102077 has 2 divisors, whose sum is σ = 101220102078. Its totient is φ = 101220102076.

The previous prime is 101220102059. The next prime is 101220102127. The reversal of 101220102077 is 770201022101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100637410756 + 582691321 = 317234^2 + 24139^2 .

It is a cyclic number.

It is not a de Polignac number, because 101220102077 - 2⁸ = 101220101821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101220107077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50610051038 + 50610051039.

It is an arithmetic number, because the mean of its divisors is an integer number (50610051039).

Almost surely, 2^101220102077 is an apocalyptic number.

It is an amenable number.

101220102077 is a deficient number, since it is larger than the sum of its proper divisors (1).

101220102077 is an equidigital number, since it uses as much as digits as its factorization.

101220102077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 392, while the sum is 23.

Adding to 101220102077 its reverse (770201022101), we get a palindrome (871421124178).

The spelling of 101220102077 in words is "one hundred one billion, two hundred twenty million, one hundred two thousand, seventy-seven".