111111020122 has 4 divisors (see below), whose sum is σ = 166666530186. Its totient is φ = 55555510060.

The previous prime is 111111020107. The next prime is 111111020147. The reversal of 111111020122 is 221020111111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 221020111111 = 281663 ⋅784697.

It can be written as a sum of positive squares in only one way, i.e., 72823879881 + 38287140241 = 269859^2 + 195671^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27777755029 + ... + 27777755032.

Almost surely, 2^111111020122 is an apocalyptic number.

111111020122 is a deficient number, since it is larger than the sum of its proper divisors (55555510064).

111111020122 is an equidigital number, since it uses as much as digits as its factorization.

111111020122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55555510063.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111111020122 its reverse (221020111111), we get a palindrome (332131131233).

The spelling of 111111020122 in words is "one hundred eleven billion, one hundred eleven million, twenty thousand, one hundred twenty-two".