122221220122 has 4 divisors (see below), whose sum is σ = 183331830186. Its totient is φ = 61110610060.

The previous prime is 122221220119. The next prime is 122221220123. The reversal of 122221220122 is 221022122221.

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

It can be written as a sum of positive squares in only one way, i.e., 73560830841 + 48660389281 = 271221^2 + 220591^2 .

It is a super-2 number, since 2×122221220122² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 122221220122.

It is not an unprimeable number, because it can be changed into a prime (122221220123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30555305029 + ... + 30555305032.

Almost surely, 2^122221220122 is an apocalyptic number.

122221220122 is a deficient number, since it is larger than the sum of its proper divisors (61110610064).

122221220122 is an equidigital number, since it uses as much as digits as its factorization.

122221220122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61110610063.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 122221220122 its reverse (221022122221), we get a palindrome (343243342343).

It can be divided in two parts, 122221 and 220122, that multiplied together give a palindrome (26903530962).

The spelling of 122221220122 in words is "one hundred twenty-two billion, two hundred twenty-one million, two hundred twenty thousand, one hundred twenty-two".