1022222120201 has 16 divisors (see below), whose sum is σ = 1096815448080. Its totient is φ = 949309009920.

The previous prime is 1022222120147. The next prime is 1022222120203. The reversal of 1022222120201 is 1020212222201.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 158363406601 + 863858713600 = 397949^2 + 929440^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1022222120201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1022222120201.

It is not an unprimeable number, because it can be changed into a prime (1022222120203) 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, 697946 + ... + 1591091.

It is an arithmetic number, because the mean of its divisors is an integer number (68550965505).

Almost surely, 2^{1022222120201} is an apocalyptic number.

It is an amenable number.

1022222120201 is a deficient number, since it is larger than the sum of its proper divisors (74593327879).

1022222120201 is a wasteful number, since it uses less digits than its factorization.

1022222120201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2289404.

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

Adding to 1022222120201 its reverse (1020212222201), we get a palindrome (2042434342402).

The spelling of 1022222120201 in words is "one trillion, twenty-two billion, two hundred twenty-two million, one hundred twenty thousand, two hundred one".