11212210121 has 16 divisors (see below), whose sum is σ = 12967257600. Its totient is φ = 9495644928.

The previous prime is 11212210063. The next prime is 11212210133. The reversal of 11212210121 is 12101221211.

It is a de Polignac number, because none of the positive numbers 2^k-11212210121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11212210096 and 11212210105.

It is not an unprimeable number, because it can be changed into a prime (11212210151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 980525 + ... + 991893.

It is an arithmetic number, because the mean of its divisors is an integer number (810453600).

Almost surely, 2^11212210121 is an apocalyptic number.

It is an amenable number.

11212210121 is a deficient number, since it is larger than the sum of its proper divisors (1755047479).

11212210121 is a wasteful number, since it uses less digits than its factorization.

11212210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13048.

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

Adding to 11212210121 its reverse (12101221211), we get a palindrome (23313431332).

The spelling of 11212210121 in words is "eleven billion, two hundred twelve million, two hundred ten thousand, one hundred twenty-one".