1200210221220 has 24 divisors (see below), whose sum is σ = 3360588619584. Its totient is φ = 320056058976.

The previous prime is 1200210221173. The next prime is 1200210221227. The reversal of 1200210221220 is 221220120021.

It is a super-2 number, since 2×1200210221220² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1200210221220.

It is not an unprimeable number, because it can be changed into a prime (1200210221227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10001751784 + ... + 10001751903.

It is an arithmetic number, because the mean of its divisors is an integer number (140024525816).

Almost surely, 2^{1200210221220} is an apocalyptic number.

1200210221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200210221220 is an abundant number, since it is smaller than the sum of its proper divisors (2160378398364).

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

1200210221220 is a wasteful number, since it uses less digits than its factorization.

1200210221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20003503699 (or 20003503697 counting only the distinct ones).

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

Adding to 1200210221220 its reverse (221220120021), we get a palindrome (1421430341241).

The spelling of 1200210221220 in words is "one trillion, two hundred billion, two hundred ten million, two hundred twenty-one thousand, two hundred twenty".