122211011021 has 4 divisors (see below), whose sum is σ = 133321102944. Its totient is φ = 111100919100.

The previous prime is 122211011009. The next prime is 122211011023. The reversal of 122211011021 is 120110112221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120110112221 = 11 ⋅10919101111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122211011021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122211010987 and 122211011005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122211011023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5555045945 + ... + 5555045966.

It is an arithmetic number, because the mean of its divisors is an integer number (33330275736).

Almost surely, 2^122211011021 is an apocalyptic number.

122211011021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122211011021 is a deficient number, since it is larger than the sum of its proper divisors (11110091923).

122211011021 is a wasteful number, since it uses less digits than its factorization.

122211011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11110091922.

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

Adding to 122211011021 its reverse (120110112221), we get a palindrome (242321123242).

The spelling of 122211011021 in words is "one hundred twenty-two billion, two hundred eleven million, eleven thousand, twenty-one".