1022211222012 has 108 divisors (see below), whose sum is σ = 2679558872536. Its totient is φ = 328561833600.

The previous prime is 1022211221987. The next prime is 1022211222059. The reversal of 1022211222012 is 2102221122201.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 23805762 + ... + 23848662.

Almost surely, 2^{1022211222012} is an apocalyptic number.

1022211222012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1022211222012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1339779436268).

1022211222012 is an abundant number, since it is smaller than the sum of its proper divisors (1657347650524).

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

1022211222012 is a wasteful number, since it uses less digits than its factorization.

1022211222012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43756 (or 43722 counting only the distinct ones).

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

Adding to 1022211222012 its reverse (2102221122201), we get a palindrome (3124432344213).

It can be divided in two parts, 102221122201 and 2, that multiplied together give a palindrome (204442244402).

The spelling of 1022211222012 in words is "one trillion, twenty-two billion, two hundred eleven million, two hundred twenty-two thousand, twelve".