122201212111220 has 36 divisors (see below), whose sum is σ = 282072715234212. Its totient is φ = 44436804403200.

The previous prime is 122201212111189. The next prime is 122201212111229. The reversal of 122201212111220 is 22111212102221.

It can be written as a sum of positive squares in 2 ways, for example, as 46766914985956 + 75434297125264 = 6838634^2 + 8685292^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 122201212111192 and 122201212111201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122201212111229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25248181901 + ... + 25248186740.

Almost surely, 2^{122201212111220} is an apocalyptic number.

122201212111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122201212111220 is an abundant number, since it is smaller than the sum of its proper divisors (159871503122992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122201212111220 is a wasteful number, since it uses less digits than its factorization.

122201212111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50496368672 (or 50496368659 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 122201212111220 its reverse (22111212102221), we get a palindrome (144312424213441).

The spelling of 122201212111220 in words is "one hundred twenty-two trillion, two hundred one billion, two hundred twelve million, one hundred eleven thousand, two hundred twenty".