11012222121 has 16 divisors (see below), whose sum is σ = 14750208000. Its totient is φ = 7307903120.

The previous prime is 11012222087. The next prime is 11012222131. The reversal of 11012222121 is 12122221011.

It is a cyclic number.

It is not a de Polignac number, because 11012222121 - 2¹³ = 11012213929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11012222121.

It is not an unprimeable number, because it can be changed into a prime (11012222131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1178056 + ... + 1187366.

It is an arithmetic number, because the mean of its divisors is an integer number (921888000).

Almost surely, 2^11012222121 is an apocalyptic number.

It is an amenable number.

11012222121 is a deficient number, since it is larger than the sum of its proper divisors (3737985879).

11012222121 is a wasteful number, since it uses less digits than its factorization.

11012222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11076.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11012222121 its reverse (12122221011), we get a palindrome (23134443132).

It can be divided in two parts, 1101 and 2222121, that added together give a palindrome (2223222).

The spelling of 11012222121 in words is "eleven billion, twelve million, two hundred twenty-two thousand, one hundred twenty-one".