111211220210122 has 16 divisors (see below), whose sum is σ = 172577279458440. Its totient is φ = 53685641382912.

The previous prime is 111211220210113. The next prime is 111211220210197. The reversal of 111211220210122 is 221012022112111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 73507457175201 + 37703763034921 = 8573649^2 + 6140339^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 111211220210122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44008263 + ... + 46466650.

Almost surely, 2^{111211220210122} is an apocalyptic number.

111211220210122 is a deficient number, since it is larger than the sum of its proper divisors (61366059248318).

111211220210122 is a wasteful number, since it uses less digits than its factorization.

111211220210122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90496137.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 111211220210122 its reverse (221012022112111), we get a palindrome (332223242322233).

The spelling of 111211220210122 in words is "one hundred eleven trillion, two hundred eleven billion, two hundred twenty million, two hundred ten thousand, one hundred twenty-two".