1220110021121 has 8 divisors (see below), whose sum is σ = 1336428826920. Its totient is φ = 1108740951808.

The previous prime is 1220110021099. The next prime is 1220110021127. The reversal of 1220110021121 is 1211200110221.

It can be written as a sum of positive squares in 4 ways, for example, as 148274284096 + 1071835737025 = 385064^2 + 1035295^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220110021121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220110021096 and 1220110021105.

It is not an unprimeable number, because it can be changed into a prime (1220110021127) 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, 1237433606 + ... + 1237434591.

It is an arithmetic number, because the mean of its divisors is an integer number (167053603365).

Almost surely, 2^{1220110021121} is an apocalyptic number.

It is an amenable number.

1220110021121 is a deficient number, since it is larger than the sum of its proper divisors (116318805799).

1220110021121 is a wasteful number, since it uses less digits than its factorization.

1220110021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2474868243.

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

Adding to 1220110021121 its reverse (1211200110221), we get a palindrome (2431310131342).

It can be divided in two parts, 12201100 and 21121, that added together give a palindrome (12222221).

The spelling of 1220110021121 in words is "one trillion, two hundred twenty billion, one hundred ten million, twenty-one thousand, one hundred twenty-one".