122221311021 has 16 divisors (see below), whose sum is σ = 181075507200. Its totient is φ = 81477769824.

The previous prime is 122221311019. The next prime is 122221311059. The reversal of 122221311021 is 120113122221.

It is not a de Polignac number, because 122221311021 - 2¹ = 122221311019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122221310985 and 122221311003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122221311071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 801940 + ... + 942098.

It is an arithmetic number, because the mean of its divisors is an integer number (11317219200).

Almost surely, 2^122221311021 is an apocalyptic number.

It is an amenable number.

122221311021 is a deficient number, since it is larger than the sum of its proper divisors (58854196179).

122221311021 is a wasteful number, since it uses less digits than its factorization.

122221311021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172465 (or 172459 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 122221311021 its reverse (120113122221), we get a palindrome (242334433242).

The spelling of 122221311021 in words is "one hundred twenty-two billion, two hundred twenty-one million, three hundred eleven thousand, twenty-one".