122240421221 has 4 divisors (see below), whose sum is σ = 129431034252. Its totient is φ = 115049808192.

The previous prime is 122240421217. The next prime is 122240421223. The reversal of 122240421221 is 122124042221.

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 72460564225 + 49779856996 = 269185^2 + 223114^2 .

It is not a de Polignac number, because 122240421221 - 2² = 122240421217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122240421223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3595306490 + ... + 3595306523.

It is an arithmetic number, because the mean of its divisors is an integer number (32357758563).

Almost surely, 2^122240421221 is an apocalyptic number.

It is an amenable number.

122240421221 is a deficient number, since it is larger than the sum of its proper divisors (7190613031).

122240421221 is an equidigital number, since it uses as much as digits as its factorization.

122240421221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7190613030.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 122240421221 its reverse (122124042221), we get a palindrome (244364463442).

The spelling of 122240421221 in words is "one hundred twenty-two billion, two hundred forty million, four hundred twenty-one thousand, two hundred twenty-one".