1223030120121 has 6 divisors (see below), whose sum is σ = 1766599062410. Its totient is φ = 815353413408.

The previous prime is 1223030120101. The next prime is 1223030120129. The reversal of 1223030120121 is 1210210303221.

1223030120121 is a `hidden beast` number, since 1 + 223 + 0 + 301 + 20 + 121 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1119651794496 + 103378325625 = 1058136^2 + 321525^2 .

It is not a de Polignac number, because 1223030120121 - 2⁹ = 1223030119609 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1223030120094 and 1223030120103.

It is not an unprimeable number, because it can be changed into a prime (1223030120129) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67946117776 + ... + 67946117793.

Almost surely, 2^{1223030120121} is an apocalyptic number.

It is an amenable number.

1223030120121 is a deficient number, since it is larger than the sum of its proper divisors (543568942289).

1223030120121 is a wasteful number, since it uses less digits than its factorization.

1223030120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135892235575 (or 135892235572 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1223030120121 its reverse (1210210303221), we get a palindrome (2433240423342).

The spelling of 1223030120121 in words is "one trillion, two hundred twenty-three billion, thirty million, one hundred twenty thousand, one hundred twenty-one".