111101021121169 has 2 divisors, whose sum is σ = 111101021121170. Its totient is φ = 111101021121168.

The previous prime is 111101021121107. The next prime is 111101021121241. The reversal of 111101021121169 is 961121120101111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109547371054144 + 1553650067025 = 10466488^2 + 1246455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111101021121169 is a prime.

It is a super-2 number, since 2×111101021121169² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111101021181169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55550510560584 + 55550510560585.

It is an arithmetic number, because the mean of its divisors is an integer number (55550510560585).

Almost surely, 2^{111101021121169} is an apocalyptic number.

It is an amenable number.

111101021121169 is a deficient number, since it is larger than the sum of its proper divisors (1).

111101021121169 is an equidigital number, since it uses as much as digits as its factorization.

111101021121169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 28.

The spelling of 111101021121169 in words is "one hundred eleven trillion, one hundred one billion, twenty-one million, one hundred twenty-one thousand, one hundred sixty-nine".