1200222021221 has 8 divisors (see below), whose sum is σ = 1242687744000. Its totient is φ = 1157828215600.

The previous prime is 1200222021217. The next prime is 1200222021241. The reversal of 1200222021221 is 1221202220021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1200222021221 - 2² = 1200222021217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1200222021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200222021241) 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, 17945321 + ... + 18012078.

It is an arithmetic number, because the mean of its divisors is an integer number (155335968000).

Almost surely, 2^{1200222021221} is an apocalyptic number.

It is an amenable number.

1200222021221 is a deficient number, since it is larger than the sum of its proper divisors (42465722779).

1200222021221 is a wasteful number, since it uses less digits than its factorization.

1200222021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35958579.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1200222021221 its reverse (1221202220021), we get a palindrome (2421424241242).

The spelling of 1200222021221 in words is "one trillion, two hundred billion, two hundred twenty-two million, twenty-one thousand, two hundred twenty-one".