1201222121221 has 8 divisors (see below), whose sum is σ = 1204956642240. Its totient is φ = 1197488607168.

The previous prime is 1201222121213. The next prime is 1201222121237. The reversal of 1201222121221 is 1221212221021.

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 1201222121221 - 2³ = 1201222121213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201222121251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2174040 + ... + 2669998.

It is an arithmetic number, because the mean of its divisors is an integer number (150619580280).

Almost surely, 2^{1201222121221} is an apocalyptic number.

It is an amenable number.

1201222121221 is a deficient number, since it is larger than the sum of its proper divisors (3734521019).

1201222121221 is an equidigital number, since it uses as much as digits as its factorization.

1201222121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503483.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1201222121221 its reverse (1221212221021), we get a palindrome (2422434342242).

The spelling of 1201222121221 in words is "one trillion, two hundred one billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred twenty-one".