1201020222221 has 16 divisors (see below), whose sum is σ = 1219908842880. Its totient is φ = 1182276336960.

The previous prime is 1201020222187. The next prime is 1201020222263. The reversal of 1201020222221 is 1222220201021.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201020222221 is a prime.

It is a super-3 number, since 3×1201020222221³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1201020222221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201020242221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47321891 + ... + 47347263.

It is an arithmetic number, because the mean of its divisors is an integer number (76244302680).

Almost surely, 2^{1201020222221} is an apocalyptic number.

It is an amenable number.

1201020222221 is a deficient number, since it is larger than the sum of its proper divisors (18888620659).

1201020222221 is a wasteful number, since it uses less digits than its factorization.

1201020222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28196.

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

Adding to 1201020222221 its reverse (1222220201021), we get a palindrome (2423240423242).

It can be divided in two parts, 1201020 and 222221, that added together give a palindrome (1423241).

The spelling of 1201020222221 in words is "one trillion, two hundred one billion, twenty million, two hundred twenty-two thousand, two hundred twenty-one".