11312202121 has 16 divisors (see below), whose sum is σ = 13024454400. Its totient is φ = 9716792400.

The previous prime is 11312202091. The next prime is 11312202133. The reversal of 11312202121 is 12120221311.

It is a cyclic number.

It is not a de Polignac number, because 11312202121 - 2⁹ = 11312201609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11312202095 and 11312202104.

It is not an unprimeable number, because it can be changed into a prime (11312202221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7806 + ... + 150616.

It is an arithmetic number, because the mean of its divisors is an integer number (814028400).

Almost surely, 2^11312202121 is an apocalyptic number.

11312202121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11312202121 is a deficient number, since it is larger than the sum of its proper divisors (1712252279).

11312202121 is a wasteful number, since it uses less digits than its factorization.

11312202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143220.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 11312202121 its reverse (12120221311), we get a palindrome (23432423432).

The spelling of 11312202121 in words is "eleven billion, three hundred twelve million, two hundred two thousand, one hundred twenty-one".