122021131111 has 16 divisors (see below), whose sum is σ = 135322384896. Its totient is φ = 109102500000.

The previous prime is 122021131097. The next prime is 122021131123. The reversal of 122021131111 is 111131120221.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122021131111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122021131511) 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, 195915 + ... + 531436.

It is an arithmetic number, because the mean of its divisors is an integer number (8457649056).

Almost surely, 2^122021131111 is an apocalyptic number.

122021131111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

122021131111 is a deficient number, since it is larger than the sum of its proper divisors (13301253785).

122021131111 is a wasteful number, since it uses less digits than its factorization.

122021131111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727614.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 122021131111 its reverse (111131120221), we get a palindrome (233152251332).

The spelling of 122021131111 in words is "one hundred twenty-two billion, twenty-one million, one hundred thirty-one thousand, one hundred eleven".