1220011022121 has 8 divisors (see below), whose sum is σ = 1626715506624. Its totient is φ = 813323609520.

The previous prime is 1220011022101. The next prime is 1220011022123. The reversal of 1220011022121 is 1212201100221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1220011022121 - 2¹³ = 1220011013929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1220011022121.

It is not an unprimeable number, because it can be changed into a prime (1220011022123) 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 7 ways as a sum of consecutive naturals, for example, 4100286 + ... + 4387751.

It is an arithmetic number, because the mean of its divisors is an integer number (203339438328).

Almost surely, 2^{1220011022121} is an apocalyptic number.

It is an amenable number.

1220011022121 is a deficient number, since it is larger than the sum of its proper divisors (406704484503).

1220011022121 is an equidigital number, since it uses as much as digits as its factorization.

1220011022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8535951.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1220011022121 its reverse (1212201100221), we get a palindrome (2432212122342).

The spelling of 1220011022121 in words is "one trillion, two hundred twenty billion, eleven million, twenty-two thousand, one hundred twenty-one".