1022022021221 has 4 divisors (see below), whose sum is σ = 1022242146912. Its totient is φ = 1021801895532.

The previous prime is 1022022021203. The next prime is 1022022021257. The reversal of 1022022021221 is 1221202202201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1022022021221 is a prime.

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 1022022021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022022021121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110055881 + ... + 110065166.

It is an arithmetic number, because the mean of its divisors is an integer number (255560536728).

Almost surely, 2^{1022022021221} is an apocalyptic number.

It is an amenable number.

1022022021221 is a deficient number, since it is larger than the sum of its proper divisors (220125691).

1022022021221 is an equidigital number, since it uses as much as digits as its factorization.

1022022021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220125690.

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

Adding to 1022022021221 its reverse (1221202202201), we get a palindrome (2243224223422).

The spelling of 1022022021221 in words is "one trillion, twenty-two billion, twenty-two million, twenty-one thousand, two hundred twenty-one".