121211111201022 has 192 divisors, whose sum is σ = 288888915744000. Its totient is φ = 36573371154432.

The previous prime is 121211111201009. The next prime is 121211111201029. The reversal of 121211111201022 is 220102111112121.

It is a happy number.

121211111201022 is a `hidden beast` number, since 121 + 211 + 111 + 201 + 0 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 121211111200986 and 121211111201004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121211111201029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 477083979 + ... + 477337977.

It is an arithmetic number, because the mean of its divisors is an integer number (1504629769500).

Almost surely, 2^{121211111201022} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121211111201022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144444457872000).

121211111201022 is an abundant number, since it is smaller than the sum of its proper divisors (167677804542978).

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

121211111201022 is a wasteful number, since it uses less digits than its factorization.

121211111201022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254547 (or 254544 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 121211111201022 its reverse (220102111112121), we get a palindrome (341313222313143).

The spelling of 121211111201022 in words is "one hundred twenty-one trillion, two hundred eleven billion, one hundred eleven million, two hundred one thousand, twenty-two".