1220100222012 has 192 divisors, whose sum is σ = 3363489153024. Its totient is φ = 336956785920.

The previous prime is 1220100221993. The next prime is 1220100222013. The reversal of 1220100222012 is 2102220010221.

It is a junction number, because it is equal to n+sod(n) for n = 1220100221982 and 1220100222000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220100222013) 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, 395749423 + ... + 395752505.

It is an arithmetic number, because the mean of its divisors is an integer number (17518172672).

Almost surely, 2^{1220100222012} is an apocalyptic number.

1220100222012 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 1220100222012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1681744576512).

1220100222012 is an abundant number, since it is smaller than the sum of its proper divisors (2143388931012).

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

1220100222012 is a wasteful number, since it uses less digits than its factorization.

1220100222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3928 (or 3926 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1220100222012 its reverse (2102220010221), we get a palindrome (3322320232233).

The spelling of 1220100222012 in words is "one trillion, two hundred twenty billion, one hundred million, two hundred twenty-two thousand, twelve".