122212322021 has 4 divisors (see below), whose sum is σ = 122216016972. Its totient is φ = 122208627072.

The previous prime is 122212322017. The next prime is 122212322033. The reversal of 122212322021 is 120223212221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120223212221 = 7 ⋅17174744603.

It can be written as a sum of positive squares in 2 ways, for example, as 97684377025 + 24527944996 = 312545^2 + 156614^2 .

It is a cyclic number.

It is not a de Polignac number, because 122212322021 - 2² = 122212322017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122212321984 and 122212322002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122212372021) 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, 1797410 + ... + 1864163.

It is an arithmetic number, because the mean of its divisors is an integer number (30554004243).

Almost surely, 2^122212322021 is an apocalyptic number.

It is an amenable number.

122212322021 is a deficient number, since it is larger than the sum of its proper divisors (3694951).

122212322021 is an equidigital number, since it uses as much as digits as its factorization.

122212322021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3694950.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 122212322021 its reverse (120223212221), we get a palindrome (242435534242).

The spelling of 122212322021 in words is "one hundred twenty-two billion, two hundred twelve million, three hundred twenty-two thousand, twenty-one".