1200022021220 has 96 divisors (see below), whose sum is σ = 2916936852480. Its totient is φ = 409844695040.

The previous prime is 1200022021207. The next prime is 1200022021241. The reversal of 1200022021220 is 221202200021.

It is a junction number, because it is equal to n+sod(n) for n = 1200022021195 and 1200022021204.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1456532 + ... + 2126388.

It is an arithmetic number, because the mean of its divisors is an integer number (30384758880).

Almost surely, 2^{1200022021220} is an apocalyptic number.

1200022021220 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 1200022021220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1458468426240).

1200022021220 is an abundant number, since it is smaller than the sum of its proper divisors (1716914831260).

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

1200022021220 is a wasteful number, since it uses less digits than its factorization.

1200022021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670373 (or 670371 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 1200022021220 its reverse (221202200021), we get a palindrome (1421224221241).

The spelling of 1200022021220 in words is "one trillion, two hundred billion, twenty-two million, twenty-one thousand, two hundred twenty".