1022001220201 has 4 divisors (see below), whose sum is σ = 1100616698692. Its totient is φ = 943385741712.

The previous prime is 1022001220181. The next prime is 1022001220267. The reversal of 1022001220201 is 1020221002201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 180472032400 + 841529187801 = 424820^2 + 917349^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022001220201 - 2⁷ = 1022001220073 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 78615478477 = 1022001220201 / (1 + 0 + 2 + 2 + 0 + 0 + 1 + 2 + 2 + 0 + 2 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1022001220601) 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 3 ways as a sum of consecutive naturals, for example, 39307739226 + ... + 39307739251.

It is an arithmetic number, because the mean of its divisors is an integer number (275154174673).

Almost surely, 2^{1022001220201} is an apocalyptic number.

It is an amenable number.

1022001220201 is a deficient number, since it is larger than the sum of its proper divisors (78615478491).

1022001220201 is an equidigital number, since it uses as much as digits as its factorization.

1022001220201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78615478490.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1022001220201 its reverse (1020221002201), we get a palindrome (2042222222402).

The spelling of 1022001220201 in words is "one trillion, twenty-two billion, one million, two hundred twenty thousand, two hundred one".