1220122102121 has 6 divisors (see below), whose sum is σ = 1321197306030. Its totient is φ = 1126266555648.

The previous prime is 1220122102099. The next prime is 1220122102123. The reversal of 1220122102121 is 1212012210221.

It can be written as a sum of positive squares in 3 ways, for example, as 6458533225 + 1213663568896 = 80365^2 + 1101664^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1220122102121 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 1220122102121.

It is not an unprimeable number, because it can be changed into a prime (1220122102123) 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 5 ways as a sum of consecutive naturals, for example, 3609828536 + ... + 3609828873.

It is an arithmetic number, because the mean of its divisors is an integer number (220199551005).

Almost surely, 2^{1220122102121} is an apocalyptic number.

It is an amenable number.

1220122102121 is a deficient number, since it is larger than the sum of its proper divisors (101075203909).

1220122102121 is an equidigital number, since it uses as much as digits as its factorization.

1220122102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7219657435 (or 7219657422 counting only the distinct ones).

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

Adding to 1220122102121 its reverse (1212012210221), we get a palindrome (2432134312342).

The spelling of 1220122102121 in words is "one trillion, two hundred twenty billion, one hundred twenty-two million, one hundred two thousand, one hundred twenty-one".