1012120221222 has 96 divisors (see below), whose sum is σ = 2410266942720. Its totient is φ = 304401240000.

The previous prime is 1012120221197. The next prime is 1012120221227. The reversal of 1012120221222 is 2221220212101.

It is a happy number.

1012120221222 is a `hidden beast` number, since 10 + 1 + 212 + 0 + 221 + 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 = 1012120221195 and 1012120221204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012120221227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34996104 + ... + 35025012.

It is an arithmetic number, because the mean of its divisors is an integer number (25106947320).

Almost surely, 2^{1012120221222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1012120221222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1205133471360).

1012120221222 is an abundant number, since it is smaller than the sum of its proper divisors (1398146721498).

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

1012120221222 is a wasteful number, since it uses less digits than its factorization.

1012120221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30250 (or 30247 counting only the distinct ones).

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

Adding to 1012120221222 its reverse (2221220212101), we get a palindrome (3233340433323).

The spelling of 1012120221222 in words is "one trillion, twelve billion, one hundred twenty million, two hundred twenty-one thousand, two hundred twenty-two".