121221201000222 has 192 divisors, whose sum is σ = 300676291755840. Its totient is φ = 35055584870400.

The previous prime is 121221201000169. The next prime is 121221201000223. The reversal of 121221201000222 is 222000102122121.

It is a happy number.

121221201000222 is a `hidden beast` number, since 1 + 21 + 221 + 201 + 0 + 0 + 0 + 222 = 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 = 121221201000195 and 121221201000204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221201000223) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 88231822 + ... + 89595182.

It is an arithmetic number, because the mean of its divisors is an integer number (1566022352895).

Almost surely, 2^{121221201000222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121221201000222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150338145877920).

121221201000222 is an abundant number, since it is smaller than the sum of its proper divisors (179455090755618).

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

121221201000222 is a wasteful number, since it uses less digits than its factorization.

121221201000222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363819 (or 1363816 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121221201000222 its reverse (222000102122121), we get a palindrome (343221303122343).

The spelling of 121221201000222 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred one million, two hundred twenty-two", and thus it is an aban number.