1220000222121 has 8 divisors (see below), whose sum is σ = 1635754488480. Its totient is φ = 808789718592.

The previous prime is 1220000222087. The next prime is 1220000222143. The reversal of 1220000222121 is 1212220000221.

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

It is not a de Polignac number, because 1220000222121 - 2¹¹ = 1220000220073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1220000222121.

It is not an unprimeable number, because it can be changed into a prime (1220000222821) 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, 1135940080 + ... + 1135941153.

It is an arithmetic number, because the mean of its divisors is an integer number (204469311060).

Almost surely, 2^{1220000222121} is an apocalyptic number.

It is an amenable number.

1220000222121 is a deficient number, since it is larger than the sum of its proper divisors (415754266359).

1220000222121 is a wasteful number, since it uses less digits than its factorization.

1220000222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2271881415.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1220000222121 its reverse (1212220000221), we get a palindrome (2432220222342).

The spelling of 1220000222121 in words is "one trillion, two hundred twenty billion, two hundred twenty-two thousand, one hundred twenty-one".