122221221222101 has 4 divisors (see below), whose sum is σ = 125202226617804. Its totient is φ = 119240215826400.

The previous prime is 122221221222041. The next prime is 122221221222209. The reversal of 122221221222101 is 101222122122221.

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 46965335971876 + 75255885250225 = 6853126^2 + 8675015^2 .

It is a cyclic number.

It is not a de Polignac number, because 122221221222101 - 2²² = 122221217027797 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 (122221221222301) 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, 1490502697790 + ... + 1490502697871.

It is an arithmetic number, because the mean of its divisors is an integer number (31300556654451).

Almost surely, 2^{122221221222101} is an apocalyptic number.

It is an amenable number.

122221221222101 is a deficient number, since it is larger than the sum of its proper divisors (2981005395703).

122221221222101 is an equidigital number, since it uses as much as digits as its factorization.

122221221222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2981005395702.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 122221221222101 its reverse (101222122122221), we get a palindrome (223443343344322).

The spelling of 122221221222101 in words is "one hundred twenty-two trillion, two hundred twenty-one billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred one".