1011011222121 has 16 divisors (see below), whose sum is σ = 1370161702848. Its totient is φ = 662934888000.

The previous prime is 1011011222077. The next prime is 1011011222129. The reversal of 1011011222121 is 1212221101101.

It is a happy number.

It is not a de Polignac number, because 1011011222121 - 2¹¹ = 1011011220073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1011011222121.

It is not an unprimeable number, because it can be changed into a prime (1011011222129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6261415 + ... + 6420851.

It is an arithmetic number, because the mean of its divisors is an integer number (85635106428).

Almost surely, 2^{1011011222121} is an apocalyptic number.

It is an amenable number.

1011011222121 is a deficient number, since it is larger than the sum of its proper divisors (359150480727).

1011011222121 is a wasteful number, since it uses less digits than its factorization.

1011011222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194152.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1011011222121 its reverse (1212221101101), we get a palindrome (2223232323222).

The spelling of 1011011222121 in words is "one trillion, eleven billion, eleven million, two hundred twenty-two thousand, one hundred twenty-one".