122211112021 has 4 divisors (see below), whose sum is σ = 122844330412. Its totient is φ = 121577893632.

The previous prime is 122211111973. The next prime is 122211112039. The reversal of 122211112021 is 120211112221.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12163001796 + 110048110225 = 110286^2 + 331735^2 .

It is a cyclic number.

It is not a de Polignac number, because 122211112021 - 2⁹ = 122211111509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122211111986 and 122211112004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122211118021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316608906 + ... + 316609291.

It is an arithmetic number, because the mean of its divisors is an integer number (30711082603).

Almost surely, 2^122211112021 is an apocalyptic number.

It is an amenable number.

122211112021 is a deficient number, since it is larger than the sum of its proper divisors (633218391).

122211112021 is an equidigital number, since it uses as much as digits as its factorization.

122211112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633218390.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 122211112021 its reverse (120211112221), we get a palindrome (242422224242).

The spelling of 122211112021 in words is "one hundred twenty-two billion, two hundred eleven million, one hundred twelve thousand, twenty-one".