1022720601221 has 16 divisors (see below), whose sum is σ = 1116669830976. Its totient is φ = 928934160000.

The previous prime is 1022720601209. The next prime is 1022720601223. The reversal of 1022720601221 is 1221060272201.

It is a de Polignac number, because none of the positive numbers 2^k-1022720601221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022720601223) 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 15 ways as a sum of consecutive naturals, for example, 94857851 + ... + 94868631.

It is an arithmetic number, because the mean of its divisors is an integer number (69791864436).

Almost surely, 2^{1022720601221} is an apocalyptic number.

1022720601221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1022720601221 is a deficient number, since it is larger than the sum of its proper divisors (93949229755).

1022720601221 is a wasteful number, since it uses less digits than its factorization.

1022720601221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17524.

The product of its (nonzero) digits is 1344, while the sum is 26.

Adding to 1022720601221 its reverse (1221060272201), we get a palindrome (2243780873422).

The spelling of 1022720601221 in words is "one trillion, twenty-two billion, seven hundred twenty million, six hundred one thousand, two hundred twenty-one".