1200011102220 has 192 divisors, whose sum is σ = 4028403456000. Its totient is φ = 261099847680.

The previous prime is 1200011102131. The next prime is 1200011102233. The reversal of 1200011102220 is 222011100021.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1200011102196 and 1200011102205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 170956 + ... + 1558604.

It is an arithmetic number, because the mean of its divisors is an integer number (20981268000).

Almost surely, 2^{1200011102220} is an apocalyptic number.

1200011102220 is a gapful number since it is divisible by the number (10) 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 1200011102220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2014201728000).

1200011102220 is an abundant number, since it is smaller than the sum of its proper divisors (2828392353780).

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

1200011102220 is a wasteful number, since it uses less digits than its factorization.

1200011102220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387768 (or 1387766 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1200011102220 its reverse (222011100021), we get a palindrome (1422022202241).

It can be divided in two parts, 120001 and 1102220, that added together give a palindrome (1222221).

The spelling of 1200011102220 in words is "one trillion, two hundred billion, eleven million, one hundred two thousand, two hundred twenty".