122121210011 has 4 divisors (see below), whose sum is σ = 122513883024. Its totient is φ = 121728537000.

The previous prime is 122121210007. The next prime is 122121210031. The reversal of 122121210011 is 110012121221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 122121210011 - 2² = 122121210007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122121210031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196336040 + ... + 196336661.

It is an arithmetic number, because the mean of its divisors is an integer number (30628470756).

Almost surely, 2^122121210011 is an apocalyptic number.

122121210011 is a deficient number, since it is larger than the sum of its proper divisors (392673013).

122121210011 is an equidigital number, since it uses as much as digits as its factorization.

122121210011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392673012.

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

Adding to 122121210011 its reverse (110012121221), we get a palindrome (232133331232).

The spelling of 122121210011 in words is "one hundred twenty-two billion, one hundred twenty-one million, two hundred ten thousand, eleven".