111021212010077 has 2 divisors, whose sum is σ = 111021212010078. Its totient is φ = 111021212010076.

The previous prime is 111021212010011. The next prime is 111021212010103. The reversal of 111021212010077 is 770010212120111.

It is an a-pointer prime, because the next prime (111021212010103) can be obtained adding 111021212010077 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110964713572441 + 56498437636 = 10533979^2 + 237694^2 .

It is a cyclic number.

It is not a de Polignac number, because 111021212010077 - 2¹² = 111021212005981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111021212010277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510606005038 + 55510606005039.

It is an arithmetic number, because the mean of its divisors is an integer number (55510606005039).

Almost surely, 2^{111021212010077} is an apocalyptic number.

It is an amenable number.

111021212010077 is a deficient number, since it is larger than the sum of its proper divisors (1).

111021212010077 is an equidigital number, since it uses as much as digits as its factorization.

111021212010077 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 26.

Adding to 111021212010077 its reverse (770010212120111), we get a palindrome (881031424130188).

The spelling of 111021212010077 in words is "one hundred eleven trillion, twenty-one billion, two hundred twelve million, ten thousand, seventy-seven".