1022001201221 has 16 divisors (see below), whose sum is σ = 1372197418368. Its totient is φ = 735105758400.

The previous prime is 1022001201217. The next prime is 1022001201227. The reversal of 1022001201221 is 1221021002201.

It is not a de Polignac number, because 1022001201221 - 2² = 1022001201217 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1022001201196 and 1022001201205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022001201227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 510489110 + ... + 510491111.

It is an arithmetic number, because the mean of its divisors is an integer number (85762338648).

Almost surely, 2^{1022001201221} is an apocalyptic number.

1022001201221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1022001201221 is a deficient number, since it is larger than the sum of its proper divisors (350196217147).

1022001201221 is a wasteful number, since it uses less digits than its factorization.

1022001201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020980252.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1022001201221 its reverse (1221021002201), we get a palindrome (2243022203422).

The spelling of 1022001201221 in words is "one trillion, twenty-two billion, one million, two hundred one thousand, two hundred twenty-one".