11111202122 has 4 divisors (see below), whose sum is σ = 16666803186. Its totient is φ = 5555601060.

The previous prime is 11111202121. The next prime is 11111202127. The reversal of 11111202122 is 22120211111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22120211111 = 8623 ⋅2565257.

It can be written as a sum of positive squares in only one way, i.e., 10164470761 + 946731361 = 100819^2 + 30769^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11111202097 and 11111202106.

It is not an unprimeable number, because it can be changed into a prime (11111202121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2777800529 + ... + 2777800532.

Almost surely, 2^11111202122 is an apocalyptic number.

11111202122 is a deficient number, since it is larger than the sum of its proper divisors (5555601064).

11111202122 is an equidigital number, since it uses as much as digits as its factorization.

11111202122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555601063.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11111202122 its reverse (22120211111), we get a palindrome (33231413233).

The spelling of 11111202122 in words is "eleven billion, one hundred eleven million, two hundred two thousand, one hundred twenty-two".