1022221210121 has 4 divisors (see below), whose sum is σ = 1022264269332. Its totient is φ = 1022178150912.

The previous prime is 1022221210069. The next prime is 1022221210187. The reversal of 1022221210121 is 1210121222201.

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 825472188025 + 196749022096 = 908555^2 + 443564^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022221210121 - 2¹⁴ = 1022221193737 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 1022221210121.

It is not an unprimeable number, because it can be changed into a prime (1022221260121) 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, 21493976 + ... + 21541481.

It is an arithmetic number, because the mean of its divisors is an integer number (255566067333).

Almost surely, 2^{1022221210121} is an apocalyptic number.

It is an amenable number.

1022221210121 is a deficient number, since it is larger than the sum of its proper divisors (43059211).

1022221210121 is an equidigital number, since it uses as much as digits as its factorization.

1022221210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43059210.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1022221210121 its reverse (1210121222201), we get a palindrome (2232342432322).

The spelling of 1022221210121 in words is "one trillion, twenty-two billion, two hundred twenty-one million, two hundred ten thousand, one hundred twenty-one".