122221222212221 has 8 divisors (see below), whose sum is σ = 135847945101024. Its totient is φ = 109013783104720.

The previous prime is 122221222212139. The next prime is 122221222212389. The reversal of 122221222212221 is 122212222122221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122221222212221 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 (122221222212421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104820944711 + ... + 104820945876.

It is an arithmetic number, because the mean of its divisors is an integer number (16980993137628).

Almost surely, 2^{122221222212221} is an apocalyptic number.

122221222212221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122221222212221 is a deficient number, since it is larger than the sum of its proper divisors (13626722888803).

122221222212221 is a wasteful number, since it uses less digits than its factorization.

122221222212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209641890651.

The product of its digits is 2048, while the sum is 26.

Adding to 122221222212221 its reverse (122212222122221), we get a palindrome (244433444334442).

It can be divided in two parts, 1 and 22221222212221, that added together give a palindrome (22221222212222).

The spelling of 122221222212221 in words is "one hundred twenty-two trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred twelve thousand, two hundred twenty-one".