1022131222121 has 4 divisors (see below), whose sum is σ = 1041416716932. Its totient is φ = 1002845727312.

The previous prime is 1022131222069. The next prime is 1022131222127. The reversal of 1022131222121 is 1212221312201.

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 360570225625 + 661560996496 = 600475^2 + 813364^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022131222121 - 2¹⁸ = 1022130959977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1022131222093 and 1022131222102.

It is not an unprimeable number, because it can be changed into a prime (1022131222127) 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, 9642747326 + ... + 9642747431.

It is an arithmetic number, because the mean of its divisors is an integer number (260354179233).

Almost surely, 2^{1022131222121} is an apocalyptic number.

It is an amenable number.

1022131222121 is a deficient number, since it is larger than the sum of its proper divisors (19285494811).

1022131222121 is an equidigital number, since it uses as much as digits as its factorization.

1022131222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19285494810.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 1022131222121 its reverse (1212221312201), we get a palindrome (2234352534322).

The spelling of 1022131222121 in words is "one trillion, twenty-two billion, one hundred thirty-one million, two hundred twenty-two thousand, one hundred twenty-one".