1012221022122 has 128 divisors (see below), whose sum is σ = 2507708160000. Its totient is φ = 300766784256.

The previous prime is 1012221022009. The next prime is 1012221022129. The reversal of 1012221022122 is 2212201222101.

It is a happy number.

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 = 1012221022095 and 1012221022104.

It is not an unprimeable number, because it can be changed into a prime (1012221022129) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 125909779 + ... + 125917817.

It is an arithmetic number, because the mean of its divisors is an integer number (19591470000).

Almost surely, 2^{1012221022122} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1012221022122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1253854080000).

1012221022122 is an abundant number, since it is smaller than the sum of its proper divisors (1495487137878).

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

1012221022122 is a wasteful number, since it uses less digits than its factorization.

1012221022122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15305 (or 15299 counting only the distinct ones).

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

Adding to 1012221022122 its reverse (2212201222101), we get a palindrome (3224422244223).

The spelling of 1012221022122 in words is "one trillion, twelve billion, two hundred twenty-one million, twenty-two thousand, one hundred twenty-two".