122101211122221 has 16 divisors (see below), whose sum is σ = 170035584897600. Its totient is φ = 77858399392128.

The previous prime is 122101211122181. The next prime is 122101211122243. The reversal of 122101211122221 is 122221112101221.

It is not a de Polignac number, because 122101211122221 - 2²³ = 122101202733613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122101211122721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9322119816 + ... + 9322132913.

It is an arithmetic number, because the mean of its divisors is an integer number (10627224056100).

Almost surely, 2^{122101211122221} is an apocalyptic number.

It is an amenable number.

122101211122221 is a deficient number, since it is larger than the sum of its proper divisors (47934373775379).

122101211122221 is a wasteful number, since it uses less digits than its factorization.

122101211122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18644252828.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 122101211122221 its reverse (122221112101221), we get a palindrome (244322323223442).

The spelling of 122101211122221 in words is "one hundred twenty-two trillion, one hundred one billion, two hundred eleven million, one hundred twenty-two thousand, two hundred twenty-one".