111020220211129 has 2 divisors, whose sum is σ = 111020220211130. Its totient is φ = 111020220211128.

The previous prime is 111020220211039. The next prime is 111020220211133. The reversal of 111020220211129 is 921112022020111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110949397695504 + 70822515625 = 10533252^2 + 266125^2 .

It is a cyclic number.

It is not a de Polignac number, because 111020220211129 - 2²¹ = 111020218113977 is a prime.

It is a super-2 number, since 2×111020220211129² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111020220211189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510110105564 + 55510110105565.

It is an arithmetic number, because the mean of its divisors is an integer number (55510110105565).

Almost surely, 2^{111020220211129} is an apocalyptic number.

It is an amenable number.

111020220211129 is a deficient number, since it is larger than the sum of its proper divisors (1).

111020220211129 is an equidigital number, since it uses as much as digits as its factorization.

111020220211129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 111020220211129 in words is "one hundred eleven trillion, twenty billion, two hundred twenty million, two hundred eleven thousand, one hundred twenty-nine".