1220012011121 has 16 divisors (see below), whose sum is σ = 1234675653120. Its totient is φ = 1205404649280.

The previous prime is 1220012011081. The next prime is 1220012011147. The reversal of 1220012011121 is 1211102100221.

It is a de Polignac number, because none of the positive numbers 2^k-1220012011121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220012011096 and 1220012011105.

It is not an unprimeable number, because it can be changed into a prime (1220012011721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206673656 + ... + 206679558.

It is an arithmetic number, because the mean of its divisors is an integer number (77167228320).

Almost surely, 2^{1220012011121} is an apocalyptic number.

It is an amenable number.

1220012011121 is a deficient number, since it is larger than the sum of its proper divisors (14663641999).

1220012011121 is a wasteful number, since it uses less digits than its factorization.

1220012011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10256.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1220012011121 its reverse (1211102100221), we get a palindrome (2431114111342).

The spelling of 1220012011121 in words is "one trillion, two hundred twenty billion, twelve million, eleven thousand, one hundred twenty-one".