1220100121121 has 8 divisors (see below), whose sum is σ = 1394407909440. Its totient is φ = 1045794275568.

The previous prime is 1220100121109. The next prime is 1220100121147. The reversal of 1220100121121 is 1211210010221.

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

It is a de Polignac number, because none of the positive numbers 2^k-1220100121121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220100121096 and 1220100121105.

It is not an unprimeable number, because it can be changed into a prime (1220100121151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1295630 + ... + 2029496.

It is an arithmetic number, because the mean of its divisors is an integer number (174300988680).

Almost surely, 2^{1220100121121} is an apocalyptic number.

It is an amenable number.

1220100121121 is a deficient number, since it is larger than the sum of its proper divisors (174307788319).

1220100121121 is an equidigital number, since it uses as much as digits as its factorization.

1220100121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971383.

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

Adding to 1220100121121 its reverse (1211210010221), we get a palindrome (2431310131342).

The spelling of 1220100121121 in words is "one trillion, two hundred twenty billion, one hundred million, one hundred twenty-one thousand, one hundred twenty-one".